How it Works
Frigidaire
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GLDB958JB
Service Manual
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Frigidaire GLDB957JB, ADW750EA, GLDB958JB, ADW850EA, GPDB998JC Service Manual

SERVICE MANUAL
24" BUILT-IN DISHWASHERS ELECTRONIC CONTROL
PRECISION WASH SYSTEM
5995293536
TABLE OF CONTENTS
Model Diagram Index ...................................................................................................................................... 5
Electrical ........................................................................................................................................................ 5
Water Supply ................................................................................................................................................. 5
Component Resistance (Ohms) ....................................................................................................................... 5
Temp Assure and Heat Delay Operation ...................................................................................................... 6
CONSTRUCTION AND OPERATION
Water Distribution System ............................................................................................................................ 7
Wash Pump ........................................................................................................................................... 7
Different Types of Precision Wash Motors ............................................................................................. 8
Upper Spray Arm ................................................................................................................................... 9
Lower Spray Arm ................................................................................................................................... 9
Filter ....................................................................................................................................................... 9
Drain Pump ............................................................................................................................................ 9
Drying System .............................................................................................................................................. 10
Lower Vent Housing ............................................................................................................................... 10
Vent Valve.............................................................................................................................................. 10
Vent Actuator ......................................................................................................................................... 10
Blower .................................................................................................................................................... 10
Upper Vent Housing ............................................................................................................................... 10
Dispensing System ....................................................................................................................................... 11
Detergent & Rinse Aid Dispenser ........................................................................................................... 11
Door Latch Assembly ................................................................................................................................... 11
Electronic Control and Thermistor ................................................................................................................ 11
No Heat Dry ........................................................................................................................................... 12
Temp Assure.......................................................................................................................................... 12
Heat Delay ............................................................................................................................................. 12
High Limit Thermostat .................................................................................................................................. 12
Dishwasher Leveling System........................................................................................................................ 12
Temperature Controls With Thermister......................................................................................................... 13
Cycles .................................................................................................................................................... 13
Options .................................................................................................................................................. 13
Dirt Sensor ................................................................................................................................................... 13
Rinse Aid Dispenser ..................................................................................................................................... 14
Bottom View ................................................................................................................................................. 15
DISASSEMBLY
Safety Precautions ....................................................................................................................................... 16
Control Panel ................................................................................................................................................ 16
Electronic Keypad - Slimline & Regular ........................................................................................................ 16
Electronic Keypad - Selectronic .................................................................................................................... 16
Control Board ............................................................................................................................................... 16
Door Panel ................................................................................................................................................... 16
Door Vent Assembly ..................................................................................................................................... 16
Vent Valve .................................................................................................................................................... 17
Page 1
TABLE OF CONTENTS
Vent Blower .................................................................................................................................................. 17
Door Latch Assembly ................................................................................................................................... 17
Detergent / Rinse Aid Dispenser .................................................................................................................. 17
Inner Door Panel .......................................................................................................................................... 17
Door Seal ..................................................................................................................................................... 17
Upper Rack .................................................................................................................................................. 17
Upper Water Tube ........................................................................................................................................ 18
Upper Spray Arm .......................................................................................................................................... 18
Water Distributor .......................................................................................................................................... 18
Kick Plate ..................................................................................................................................................... 18
Heating Element ........................................................................................................................................... 18
Float Switch and Bracket .............................................................................................................................. 19
Water Valve .................................................................................................................................................. 19
Drain Pump .................................................................................................................................................. 19
Lower Spray Arm .......................................................................................................................................... 20
Glass Trap .................................................................................................................................................... 20
Lower Spray Arm Support ............................................................................................................................ 20
Filter ............................................................................................................................................................. 20
Pump Cover ................................................................................................................................................. 20
Pump and Motor Assembly .......................................................................................................................... 20
Motor Mounting Bracket ............................................................................................................................... 21
Motor and Impeller ........................................................................................................................................ 21
Thermistor .................................................................................................................................................... 21
High Limit Thermostat .................................................................................................................................. 21
Indicator Lamps ............................................................................................................................................ 21
TROUBLESHOOTING ...................................................................................................... 22
Troubleshooting Tips .............................................................................................................................. 22
Troubleshooting Diagnostics .................................................................................................................. 24
APPENDIX A - Exploded Views ...................................................................................... A-1
APPENDIX B - Wiring Diagrams & Timer Charts
Frigidaire Models - 154371501 ............................................................................................................... B-1
Amana Models - 154390601 .................................................................................................................. B-2
Page 2
SAFE SERVICING PRACTICES - ALL APPLIANCES
To avoid personal injury and/or property damage, it is important that Safe Servicing Practices be observed. The following are some limited examples of
safe practices:
1. DO NOT attempt a product repair if you have any doubts as to your ability to complete it in a safe and satisfactory manner.
2. Before servicing or moving an appliance:
Remove the power cord from the electrical outlet, trip the circuit breaker to
the OFF position, or remove the fuse.  Turn off the gas supply.  Turn off the water supply.
3. Never interfere with the proper operation of any safety device.
4. USE ONLY REPLACEMENT PARTS CATALOGED FOR THIS APPLIANCE.
SUBSTITUTIONS MAY DEFEAT COMPLIANCE WITH SAFETY STANDARDS SET FOR HOME APPLIANCES.
5. GROUNDING: The standard color coding for safety ground wires is GREEN, or GREEN with YELLOW STRIPES. Ground leads are not to be used as current carrying conductors. It is EXTREMELY important that the service technician reestablish all safety grounds prior to completion of service. Failure to do so will create a hazard.
6. Prior to returning the product to service, ensure that:
All electrical connections are correct and secure  All electrical leads are properly dressed and secured away from sharp
edges, high-temperature components, and moving parts
All non-insulated electrical terminals, connectors, heaters, etc. are
adequately spaced away from all metal parts and panels
All safety grounds (both internal and external) are correctly and securely
connected
All panels are properly and securely reassembled
ATTENTION!!!
This service manual is intended for use by persons having electrical and mechnical training and a level of knowledge of these subjects generally considered acceptable in the appliance repair trade. Electrolux Home Products cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the use of this manual.
© 2001 White Consolidated Industries
Page 3
WHAT'S NEW
√ QUIETER OPERATION - Possible in part because only one spray arm operates at a time. Since only one
spray arm is in motion at a time, a smaller, quieter, motor can be used to recirculate the water.
√ USES LESS WATER - Since only one spray arm is in operation at a time, less water is needed in the sump
than previous dishwashers. (EXAMPLE: 1.2 gal./ fill vs. 2.3 gal./ fill on previous Ultra-Style models.)
√ USES LESS DETERGENT - Because less water is used, less detergent is required. EXAMPLE: 27 ml.
vs. 47 ml. on previous Ultra-Style models.
√ SEPARATE RECIRCULATE AND DRAIN PUMPS - The recirculate pump operates in one direction only.
A smaller, separate pump is used to drain the water from the sump.
√ FULL FLOW FILTRATION - 100% of the water distributed to the spray arms is continually filtered.
√ GLASS TRAP - Removes any particles which are too large to pass through the pump.
√ NEW DETERGENT AND RINSE AID DISPENSER - The detergent dispenser and rinse aid dispenser
are incorporated into a single dispenser that utilizes a single actuator to dispense both products.
√ PTC HEATING ELEMENT - This element is self regulating to provide lower wattages during the dry cycle
than in the wash cycle when it is used to boost the water temperature.
√ VENT VALVE - Closed during water recirculation cycles for quiet operation, but opens during dry cycle
to allow moist air to escape.
√ TEMP ASSURE AND HEAT DELAY THERMISTOR - A single thermistor located beneath the sump
raises the water temperature in the wash and rinse cycles. This is accomplished by the electronic control stopping the cycle advancement (for a maximum of 10 minutes) until the element has heated the water to the required temperature.
√ HIGH LIMIT THERMOSTAT - Located on the left rear tub bottom, the high limit thermostat is used to
prevent the tub from overheating in the event of a component failure.
√ FAN ASSISTED DRYING - Some models are fan assisted to speed up the drying process. Although this
concept is not new, the type of fan (squirrel cage) and location (door) are.
√ TURBIDITY SENSOR - Checks to see how dirty water is in the 1st Wash cycle and in the 1st Rinse cycle.
√ RINSE AID DISPENSER - Has a small circuit board which detects when the
on Jet Dry. It will display a "LO" in the display window for
Display Models Only
Rinse Aid Dispenser
.
is low
Page 4
TECHNICAL SPECIFICATIONS
WATER SUPPLY
Suggested Min. Water Temperature
120° F
Pressure (PSI) Minimum/Maximum
20/120
Connection (NPT) 3/8"
Water Valve Flow Rate (GPM)
0.83
Water Fill Time (± 3 Seconds)
87
Water Volume Per Fill (Gal.)
1.2
Water Level in Tub
Just to bottom of
element supports
Total Gallons (normal wash)
6.0
Water Recirculation Rate (GPM)
12
COMPONENT RESISTANCE - OHMS
PTC Heating Element 9.28
Pump Motor Windings 4.3
Drain Motor Windings 28
Vent Door Actuator 1893
Dispenser Actuator 1928
Water Valve Solenoid 699
Blower Motor 214
For Models: GLDB957JB* ADW750EA*
GLDB958JB* ADW850EA* GPDB998JC*
* = Color Code
DIAGRAM INDEX
GLDB957JB* B - 1 B - 1
GLDB958JB* B - 1 B - 1
GPDB998JC* B - 1 B - 1
ADW750EA* B - 2 B - 2
ADW850EA* B - 2 B - 2
Rating 120V 60Hz
Separate Circuit 15 Amp
Total Amps (Load Rated)
Recirculate Motor RPM Amps Thermal Cutout Temp.
PTC Heating Element During Wash Cycle During Dry Cycle
High Limit Thermostat opens at
MODEL
NUMBER
CYCLE CHART
ELECTRICAL
WIRING
DIAGRAM
11.0
3200 ccw
3.4
150° C
900 Watts 700 Watts
200° F
Temp Assure All cycles except China/Crystal
Temp Assure China/Crystal Cycle
Hi-Temp Wash
Hi-Temp Rinse
136° F
Water Temp
127° F
Water Temp
143° F
Water Temp
145° F
Water Temp
Page 5
TEMP ASSURE & HEAT DELAY
OPERATION
WASH CYCLE RINSE CYCLE
OPTIONS SELECTED
High Temp Wash - OFF
High Temp Rinse - OFF
High Temp Wash - OFF
High Temp Rinse - OFF
High Temp Wash - OFF
High Temp Rinse - ON
High Temp Wash - ON
High Temp Rinse - ON
Temp Assure
(*1st potential Delay)
136°F Bypassed 136°F Bypassed
136°F143°F136°F145°F
136°F Bypassed 136°F145°F
136°F143°F136°F145°F
Heat Delay
(*2nd potential delay)
Temp Assure
(*3rd potential Delay)
(*4thd potential delay)
Heat Delay
* Dishwasher will not delay if water is already up to temperature. Maximum delay for each Temp Assure and
Heat Delay interval is 10 minutes. (Temperatures listed are actual operating temperatures of thermistor.)
Also note that:
Temp Assure water temperature for the China/Crystal cycle is only 127°F. When High Temp Wash is selected, the potential delay will occur near the end of the 3rd wash cycle. High Temp Rinse causes a potential delay near the end of the 2nd Rinse cycle (Hi-Temp Rinse is not
used in the China/Crystal cycle) .
Page 6
CONSTRUCTION & OPERATION
WATER DISTRIBUTION SYSTEM
The water distribution system consists of an upper and lower spray arm, upper (spray) arm delivery tube, filter, soil director, pump, sump, and check ball. The system is designed to operate only one spray arm at a time. During the first wash and first and second rinses, only the lower spray arm operates. In the second wash, third and fourth rinses the spray arms alternate about every 90 seconds.
This alternating of the spray arms is achieved with a check ball located on a ramp between two outlets of the pump. There is an outlet to the bottom spray arm and an outlet to the upper arm delivery tube. In the normal position the ball is at the bottom of the ramp, in front of the opening to the upper arm delivery tube.
Not all of the water is blocked however. The opening is constructed to allow a small amount of water to bypass the ball and enter the tube, and fills the tube at a rate of approximately four inches a second. At the same time, the outlet to the lower spray arm is open, so the lower spray arm operates. When the pump stops, the pressure is removed from the ball and the water flows down the tube, forcing the ball up the ramp and against the outlet to the lower spray arm. If the pump remains off for more than 3 seconds, all the water in the tube escapes and the ball returns to the bottom of the ramp. But, if the pump is started in less than .6 seconds, the water from the upper arm delivery tube is still forcing the ball up the ramp against the outlet to the lower spray arm. The force of the water from the pump continues to hold the ball against the outlet to the lower spray arm which leaves the outlet to the upper arm delivery tube open. When the ball is in this position only the upper spray arm operates. This momentary stopping of the pump is controlled by the control board.
Another unique feature of the water distribution system is the two cavities of the sump. One cavity provides filtered water to the pump for recirculation through the spray arms. The other, called a quiet water cavity, allows soil to collect in the area of the macerator blade, where it is held until the drain pump removes it.
When the pump starts, the force of the water pushes the ball to block the opening to the upper arm delivery tube.
WATER DISTRIBUTION COMPONENTS
Wash Pump
The recirculation (wash) pump has three (3) functional parts, a 1/12th HP drive motor, impeller, and macerator blade. The pump circulates water at the rate of 12 gallons per minute. This pump is used only during the wash cycle, a separate pump is used during the drain cycle. The wash pump is to be replaced as a complete assembly.
Page 7
Different Types of Precision Wash Motors
Emerson Motor with Aluminum Motor Mount
ASKO Motor - Phase II Emerson Motor with Phase Mounting Bracket
ASKO Motor - Phase III
Page 8
Upper Spray Arm
The upper spray arm hangs from a bracket that is snapped to the bottom of the upper rack. The water is supplied to the arm with a nozzle and funnel arrangement. The nozzle is located at the top of the tub and the funnel is located directly below it and directs water into the arm. All the spray jets but three (3) face up.
Lower Spray Arm
The lower spray arm rotates on the lower spray arm support. It has two functions, washing the dishes and cleaning the filter. The jets located on the top of the arm clean the dishes and propel the arm. The three (3) jets located on the bottom of the arm are aimed to flush the soil on the filter toward the glass trap and soil director.
Drain Pump
The drain pump has only one function, to remove water from the dishwasher. The drain pump is driven by a 1/
th
HP drive motor. It consists of three (3) functional
25 parts; a pump cover, impeller and armature, and stator.
The quiet cavity and impeller cavity are connected by a hose underneath the sump. This connection between the two cavities allows both cavities to be drained.
Filter
The filter consists of two parts, an inner basket constructed of fine polyester mesh, and an outer filter of stainless steel.
DRYING SYSTEM
At the start of the dry cycle, a vent opens at the upper left hand corner of the door allowing the warm moist air to escape out the front of the control panel. Dry room air is drawn into the dishwasher tub through an opening across the bottom of the door. If the heated dry cycle is selected, the heating element raises the temperature of the air to increase the evaporation rate and the flow rate of the air through the dishwasher. These models incorporate the use of a small motor and centrifugal blower to accelerate the movement of air through the dishwasher.
Page 9
The door vent actuator opens the vent only during the dry cycle. It is closed during all other cycles to minimize heat loss and to prevent noise from being transmitted into the kitchen.
DRYING SYSTEM COMPONENTS
Lower Vent Housing
The lower vent housing is located between the inner door assembly and control housing and is mounted to the inner door panel. The lower vent housing surrounds an opening in the inner door panel. This opening is covered with a moveable vent valve.
Vent Valve
When the timer enters the dry cycle, 120 VAC is applied to the wax motor. The wax motor is made up of a heating disk, fluid chamber and piston. When voltage is applied to the heating disk, it heats the fluid in the chamber causing the fluid to expand, driving the piston out. The piston forces the slide out and causes the vent valve to open.
The vent actuator is replaced as a complete assembly, no replacement parts are available.
Blower
Electronic control models use a small motor and centrifugal blower assembly that is mounted to the top section of the lower vent housing.
The vent valve is a rectangular rubber covered pad slightly larger than the opening. The vent valve is attached to the vent actuator which is electrically operated.
Vent Actuator
The actuator is made up of a rod, slide, wax motor and spring. The valve is attached to one end of the rod and the slide is inserted in the other. The spring pushes in on the slide forcing the rod to push the valve against the opening in the door panel.
Upper Vent
Housing
Upper Vent Housing
The upper vent housing is screwed to the blower and directs the air from the blower to the outlet in the console.
Blower Motor
Actuator (on rear)
Lower Vent Housing
Vent Valve
Page 10
DISPENSING SYSTEM
DOOR LATCH ASSEMBLY
Detergent & Rinse Aid Dispenser
The detergent and rinse aid dispenser consists of two dispensers combined in one housing that are controlled with one wax motor actuator. The first time the actuator is energized in a cycle it dispenses detergent. The second time the actuator is energized it dispenses rinse aid. Using a pointer under the fill cap, the amount of rinse aid dispensed may be adjusted from one (1) to four (4) ml. The dispenser is replaced as a complete assembly, no replacement parts are available. If a more detailed explanation on how the dispenser operates is desired; continue.
The dishwasher has two detergent cups, one is the dispenser that has a spring loaded cover with a manual or automatic release latch. The other cup is formed in the inner door panel without a cover. Prior to starting the dishwasher, detergent is added to the dispenser cup and the cover is latched closed. The open cup is also filled but empties into the tub as soon as the door is lifted to the upright position.
The detergent in the covered cup is held until the start of the second wash. The timer then supplies 120 VAC to the dispenser actuator for one minute. It takes about 30 seconds for the actuator to move the pivot arm far enough to release the cover. When power is applied to the actuator, the actuator plunger pushes the end of the pivot arm down. The pivot arm rotates on the shaft of the detergent dispenser door latch. As the shaft rotates, it turns the door latch releasing the spring loaded cover.
The pivot arm is spring loaded so that when power is removed it returns to the normal (horizontal) position. The other end of the pivot arm has a pin that moves in a slot(s) of the rinse injector pump arm. The rinse injector pump arm is slotted in such a way that when the actuator pushes the lever down the first time to release the detergent cup cover, the pin moves up but does not raise the rinse injector pump arm. When the timer removes power from the actuator, the spring forces the rinse injector pump arm end of the pivot arm down. The compound slot in the rinse injector pump arm directs the pivot arm pin down the front of the rinse injector pump arm and under a shorter slot in the center of the arm. When the timer reaches the middle of the final rinse cycle, it again applies 120 VAC to the dispenser actuator which forces the pivot arm up at the rinse injector end. As the pin engages the shorter slot it raises the rinse injector pump arm which operates the pump. When the power is removed, the pivot arm spring forces the pin to the bottom of the slot. A leaf spring pushes the rinse injector pump arm to the left so that the pin returns to the original starting position.
The door latch assembly has two functions, one is to lock the door in a closed position and the other is to operate the door switches.
The door latch assembly consists of the door handle, door handle bracket, door catch, door switch bracket and door switches. The assembly is secured to the inner door panel with two locator pins and two screws. The handle is hidden by, and accessed through the control panel.
When the door is closed, the door strike, mounted on the tub, forces the spring loaded catch to rotate back until the bottom of the catch clears the door handle bracket. At that time the spring forces the door handle bracket to rotate. The bar on the top of the door handle rotates back under the door catch locking the door. The plunger on the bottom of the bracket rotates forward closing the door switches.
The door is released by lifting up on the door handle. When the handle is lifted up, the door handle bracket rotates in at the top, allowing the door catch to rotate open, and out at the bottom to open the door switches. When the catch is rotated to the open position, it holds the door handle bracket away from the door switches.
Page 11
ELECTRONIC CONTROL AND THERMISTOR
There are three styles of electronic controls used in the Precision Wash System dishwashers. There is a 9 pad key, 10 pad key and a 12 pad key control. The 12 pad key is the only one that has the display window for the time display or the Code display which are:
LO low liquid in the Rinse Aid Dispenser PF power failure has occurred HO water heating display CL close and latch the door 01-09 hours for delay start
The electronic control dishwashers use one thermistor (instead of two thermostats) to control water temperature during the various cycles. The thermistor is located underneath the sump and is controlled by impulses from the control board.
No Heat Dry
This selection allows the consumer to turn off the heating element for the drying cycle. If not selected the element will automatically come on for the dry cycle.
Temp Assure
"Temp Assure" is an automatic water heating function that ensures that the water in the tub is heated to 140°F (except for the China/Crystal cycle where the water temperature 125°F in the main wash cycle and reaches
130°F in the final rinse cycle). "Temp Assure" occurs near the end of the third wash cycle and near the end of the second rinse cycle. When the thermistor senses that the water is cooler than 140°F, it will stat in this no more than 10 minutes, then the control will advance on into the cycle whether or not it reached 140°F. This is designed to keep the dishwasher from running for too long of a period trying to raise thewater temperature.
Heat Delay
"Heat Delay" is an optional function that must be selected by the consumer (bypassed for China/Crystal cycle). "Heat Delay" occurs near the end of the third wash cycle and near the end of the second rinse cycle right after the Temp Assure process. "Heat Delay" is controlled by the Hi-Temp Wash and/or Hi-Temp Rinse touchpads. When a consumer selects either one or both of these options, the thermistor stops the cycle from continuing until either the water reaches 144°F or until 10 minutes have passed. After 10 minutes the cycle automatically starts again. This allows the water to be heated and does not stop the cycle indefinitely.
HIGH LIMIT THERMOSTAT
Located on the left rear tub bottom, the high limit thermostat is used to prevent the tub from overheating in the event of a component failure. The thermostat will open at 200°F.
DISHWASHER LEVELING SYSTEM
The dishwasher is leveled with fout leveling legs and they are screwed into the bottom of the support frame. There is a 3/16" hex head on top of the leg leveler to help make adjusting of the leg leveler easier by using a socket on it.
Page 12
TEMPERATURE CONTROLS WITH THERMISTER
The Thermister controls the temperature inside the dishwasher (Solid State only, depending on what cycle is selected and what other options are selected). Functional description are as follows:
CYCLES
Pots & Pans - This is a cycle for heavily soiled
dishes. The control automatically selects an assured water temperature of 135°F in the main wash cycle and 140°F in the final rinse. This is when there are no options selected.
Normal Wash - This cycle is used for normally
soiled dishes. The control automatically selects an assured water temperature of 135°F in the main wash cycle and 140°F in the final rinse. This is when there are no options selected.
China/Crystal - This cycle is used for delicate
china or crystal. The control automatically selects an assured water temperature of 125°F in the main wash cycle and 130°F in the final rinse. The following options are not available for this cycle: HI-TEMP WASH, HI-TEMP RINSE, SANI RINSE, or SOIL SENSING OPTIONS.
Both Racks - A cycle used for lightly soiled
dishes. The control automatically selects an assured water temperature of 135°F in the main wash cycle and 140°F in the final rinse. All options plus SOIL SENSING are available
Upper Rack - A cycle used for small loads of
glassware or cups, etc. The control automatically selects an assured water temperature of 135°F in the final rinse cycle. The following options are not available for this cycle: HI-TEMP WASH, HI-TEMP RINSE, SANI RINSE, or SOIL SENSING OPTIONS.
OPTIONS
HI-TEMP WASH - Selects both the wash
temperature delay which is 140°F and the rinse temperature delay which is 145°F. The maximum delay time is 10 minutes per delay.
HI-TEMP RINSE - Selects only the rinse temperature
delay which is 145°F. The maximum delay time is 10 minutes for this delay.
SANI-RINSE - Selects both the wash temperature
delay which is 145°F and the rinse temperature delay which is 150°F. At the end of the HI-TEMP RINSE, an additional 10 minutes of rinsing time is added to ensure sanitation. The heater will be cycled on and off to maintain the water temperature at 150°F. The maximum dalay time is 10 minutes for the wash temperature delay and 20 minutes for the rinse delay.
DIRT SENSOR
The true name of the sensor is called the Turbidity Sensor. It is located just in front of the wash impeller on the sump. The sensor is mounted by two cross point head mounting screws.There is a locating tab on the sensor and a knotch on the sump to ensure the sensor is intalled correctly. The sensor is a device that senses how dirty the water is. This is done when the customer loads the dishwasher with dirty dishes, then starts the unit. The sensor will then sense how dirty the water is. The DC output voltage of the sensor will be monitored at the end of the 30 second pause in the first wash and the first rinse. If a sufficient quantity of soil exists, the control will add two additional rinses for a total of eight fills, or 9.6 gallons of water. Should the sensor detect a light soil condition, the control will subtract two rinses for a total of four fills, or 4.8 gallons of water. The Normal cycle can either increase or decrease the time of a wash cycle. It just depends on how dirty the water is.
Lower Rack - A cycle used for small loads of pans,
silverware, dishes, etc. The control automatically selects an assured water temperature of 135°F in the final rinse cycle. The following options are not available for this cycle: HI-TEMP WASH, HI-TEMP RINSE, SANI RINSE, or SOIL SENSING OPTIONS.
Rinse & Hold - A cycle for rinsing dishes that will
be washed later. No options can be used except Delay Start.
Controls Locked - The
disables the keyboard but does not interfere with any cycle in progress. The controls may be locked or unlocked by depressing NO-HEAT DRY / COOL DRY on the touch pad for 5 seconds when the door is latched. The Controls Locked LED is illuminated only when the control is locked.
Controls Locked
feature
To check to see if the sensor is working properly, start the dishwasher in the sensor light to light up on the control panel. If no light is illuminated, look at the plug on the sensor to ensure that it is plugged in. After the dishwasher has completed a wash and rinse cycle, and has filled up again with clean water, look to make sure the time clock on the control panel is counting down. If not, turn the power off to the dishwasher to make it go into the power failure mode. Then, press and hold the upper rack and start cancel pad. If any numbers come on in the display area, this means the sensor is good. If there is no display of numbers or just blank, then the sensor is bad.
If there is a leak underneath the sensor, check to see if the sensor was installed correctly. There is a locking tab on the sensor which lines up with a notch on the sump. If the sensor is mounted the opposite way, this can
Page 13
Normal
cycle, then look for a
cause a leak down onto the floor. Another leak possibility is an missing or damaged "O" ring that fits over top of the covered sensing light of the sensor.
The sensor will not function in the following cycles:
Light Wash (Upper Rack) Light Wash (Lower Rack) China / Crystal.
WARNING: WHEN UNPLUGGING THE JUMPER WIRE THAT YOU USED, MAKE SURE YOU TURN OFF THE POWER SUPPLY FIRST, UNHOOK THE TWO WIRES TO THE JUMPER, THEN RECONNECT WIRE TO CIRCUIT BOARD. RESTORE POWER.
RINSE AID DISPENSER
The Rinse Aid Dispenser has a circuit board located on the dispenser to send a signal to the control board display. When the rinse aid is low with Jet Dry, the board will send a signal to the display window and will display a "LO" which indicates that the customer needs to fill the rinse aid dispenser back up with Jet Dry solution. NOTE: The "LO" is only shown on the display during the time the "Clean" light is on.
One way to check to see if you have a bad board when there is no "LO" displaying is to turn off the power supply (breaker) and pull off the two wires going to the small circuit board and use a jumper wire to jump from one wire to the other. Then, turn the power supply back on. "PF" should start flashing in the display window. Now, latch the door and the flashing "PF" should go out. This is called the "Idle Mode". To go into the "Service Test Mode", simultaneously press the HI-TEMP WASH & START/CANCEL pads for 1.5 to 2 seconds. It should display a 07 in the Display Window. Keep pushing the START/CANCEL pad until it gets down to the clean cycle. Here is where the LO should appear in the display window. When this does come on,this indicates that there is a defect in the small circuit board on the detergent assembly. If ther is not a display of "LO", then this indicates that there is a control board defect, or a loose or broken wire. Check wires first for continuity. If ok, replace Control Board.
Page 14
Thermistor
Hi-Limit Thermostat
Drain Pump & Motor
Bottom View
Page 15
DISASSEMBLY
SAFETY PRECAUTIONS
Always turn off the electric power supply before servicing any electrical component, making ohmmeter checks, or making any parts replacement. Refer to safe servicing procedures at the front of this service manual before servicing the dishwasher.
All voltage checks should be made with a voltmeter having a full scale range of 130 volts or higher.
After service is completed, be sure all safety grounding circuits are complete, all electrical connections are
secure, and all access panels are in place.
CONTROL PANEL
1. Disconnect dishwasher from electrical supply.
2. Remove six Phillips screws from top of inner door panel.
ELECTRONIC KEYPAD - SLIMLINE & REGULAR
1. Disconnect dishwasher from electrical supply.
2. Remove control panel. See "Control Panel."
3. Remove four screws securing protective cover around control board.
4. Disconnect keypad ribbon from control board.
5. Peal overlay and keypad away from front of control panel.
6. When replacing overlay and keypad, use denatured alcohol to get old glue residue off of control panel face.
7. Remove protective paper from back of new keypad exposing side with glue.
8. Line up new keypad to corners of control panel and lay down making sure its straight.
9. Connect new ribbon to control circuit board.
5. Remove cycle selector knob from face of control panel. See "Selector Switch."
6. Peal overlay and keypad away from front of control panel.
7. When replacing keypad, use denatured alcohol to get old glue residue off of control panel face.
8. Remove protective paper from back of new keypad exposing side with glue.
9. Line up new keypad to corners of control panel and lay down making sure it's straight.
10. Reconnect ribbons to control circuit board.
11. Replace cycle selector knob. See "Selector Knob."
CONTROL BOARD - All Electronic Controls
1. Disconnect dishwasher from electrical supply.
2. Remove control panel. See "Control Panel."
3. Remove four screws securing protective cover around control board.
4. Disconnect keypad ribbons from control board.
5. Disconnect four wire terminals (PT01 - PT04) from control board.
6. Disconnect large white wiring harness pin connector from control board.
7. For Selectronic models, remove pin connector from cycle selector switch.
8. Remove six screws securing control board to back of control panel.
DOOR PANEL
1. Disconnect dishwasher from electrical supply.
2. The outer door panel is held to the inner door panel with two locking tabs and two screws. Loosen the two lower screws securing the control panel.
3. Remove two screws securing door panel to door (located at lower section of inner door panel).
4. Slide door panel down and outward to remove.
ELECTRONIC KEYPAD - SELECTRONIC
1. Disconnect dishwasher from electrical supply.
2. Remove control panel. See "Control Panel."
3. Remove four screws securing protective cover around control board.
4. Disconnect keypad ribbons from control board.
DOOR VENT ASSEMBLY
1. Disconnect dishwasher from electrical supply.
2. Remove outer door panel.
3. Remove control panel.
4. Disconnect wiring to the blower motor and vent actuator.
5. Remove four Phillips screws securing vent to inner door panel.
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VENT VALVE
DETERGENT / RINSE AID DISPENSER
1. Disconnect dishwasher from electrical supply.
2. Remove outer door panel.
3. Disconnect wiring connections.
4. Remove six Phillips screws and carefully push dispenser into tub.
1. Disconnect dishwasher from electrical supply.
2. Remove outer door panel.
3. Remove control panel.
4. Remove door vent assembly.
5. Slide vent valve upward to remove from actuator arm.
VENT BLOWER
1. Remove door vent assembly.
2. Remove two screws securing top vent piece.
3. Remove four screws securing lower vent to blower motor.
DOOR LATCH ASSEMBLY
1. Disconnect dishwasher from electrical supply.
2. Remove outer door panel.
3. The door latch is held to the inner door panel with two screws and two locator pins. Remove screws and pull to remove.
4. To remove door switches, push plastic bracket open and rotate bottom of switch up.
INNER DOOR PANEL
1. To replace inner door panel, remove control panel, door vent, dispenser and latch.
2. Remove two bolts (T-25 TORX®) from each hinge and lift off.
DOOR SEAL
1. To remove seal, lift one end and pull entire seal out.
2. To replace or reinstall seal, center white mark at top of seal recess and press seal in place, going left and then right from top center. Do not stretch seal while installing.
UPPER RACK
1. To remove rack, unsnap and remove retainers at end of metal track. Once retainers are removed, pull rack straight out.
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2. Each rack roller is each secured with a T-25 TORX® bolt.
WATER DISTRIBUTOR
1. The water distributor is screwed to top of upper arm delivery tube. A rubber seal is used on top side of tub to eliminate leaks.
KICK PLATE
1. To remove kick plate and insulation (some models) remove two Phillips screws and pull out on bottom of kick plate.
UPPER WATER TUBE
1. To remove upper water tube, press in on top of two clips and lift up.
HEATING ELEMENT
1. Disconnect dishwasher from electrical supply.
2. To remove element, disconnect wiring and remove two element mounting nuts.
3. Lift terminal ends of element into tub and rotate element sideways, out of retainers.
UPPER SPRAY ARM
1. To remove upper spray arm, unscrew plastic nut securing it to support.
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FLOAT SWITCH AND BRACKET
1. Disconnect dishwasher from electrical supply.
2. To remove float switch bracket, remove outer door panel, kick plate, and wires to float switch. A single Phillips screw secures bracket to tub.
3. Remove float switch by spreading mounting clips.
2. Remove outer door panel and kick plate.
3. Remove hoses and wiring to drain pump.
4. Remove two screws securing drain pump to mounting bracket.
WATER VALVE
1. Disconnect dishwasher from electrical supply.
2. Remove outer door panel, kick plate, and wires.
3. The water valve is secured with two 5/16" hex screws.
DRAIN PUMP
1. Disconnect dishwasher from electrical supply.
5. The drain pump assembly consists of three primary parts, (1) stator winding, (2) motor armature & impeller, and (3) front housing. To remove front housing, turn housing about 45° counterclockwise and lift off.
6. To remove stator winding, release plastic catches and slide stator winding off.
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