Frigidaire FDB979GFW2 Wiring Diagram

Exploded View of Wash System

Nozzle

Funnel

Nut

Funnel Base

Center Spray Arm

Lower Spray Arm

Motor Bracket

Seal

Check Ball

Circulation Motor

Impeller

Barrel Rear

Drain Hose

Spray Arm

Support

Glass Trap

Heating

Element

Filter

Soil Director

Volute Cover

Drain Motor

Macerator

Delivery Tube

Barrel Front

Connector Hose

Water Inlet Tube

Sump

Water Valve	Impeller Screw

Incoming Water Supply

Standard Dry Air Flow

Power Dry Air Flow

When the control advances to the “dry” portion of the cycle, a linear actuator retracts a vent valve opening a vent path through a console vent into the kitchen. This venting method eliminates discharging heated moisture into the motor compartment. The heated, moist air leaving the dishwasher through the console vent causes drier air to be drawn into the unit by way of intake vents located at the bottom of the door. The water on the dishes is evaporated into drier air and the venting process continues. The heating element is turned ON and OFF during the entire drying cycle.

The Power Dry configuration is the same as the Standard except it has a cross flow blower located in the air discharge path. The blower assists the heating element in producing power to drive the moist air out of the dishwasher.

Detergent and Rinse Aid Dispenser

The detergent and rinse aid dispenser is a one piece component consisting of a molded detergent cup and a built-in rinse aid dispenser.

The detergent cup has a spring loaded cover and the rinse aid dispenser has a removable cover.

Liquid rinse aid is added to the dispenser up to the fill line indicator. The amount of rinse aid released can be adjusted by turning the arrow indicator from one, being the least amount, to four, being the greatest amount.

To replace dispenser:

•shut off electricity to dishwasher,

•remove outer door panel assembly,

•disconnect wiring to the actuator,

•remove the six screws,

•remove the dispenser,

•replace and reinstall screws,

•rewire actuator.

To replace actuator:

•shut off electricity to dishwasher,

•disconnect wiring to the actuator,

•place a flat head screwdriver under the actuator body and between the dispenser housing and terminal side, twist and lift up on the actuator being careful not to damage the retainer snap-fits,

•replace with new actuator by pressing into place,

•rewire actuator.

Trouble Shooting Tips

Personal Injury Hazard

Always disconnect the dishwasher from the electrical power source before adjusting or replacing components.

Symptom	Check the Following		Remedy
Dishwasher will not operate when	1. Fuse (blown or tripped).		1.	Replace fuse or reset breaker.
turned on.	2. 120 VAC supply wiring connection		2.	Repair or replace wire fasteners at
		faulty.		dishwasher junction box.
	3.	Electronic control board defective.	3.	Replace control board.
	4.	No 12 VAC power to control.	4.	Replace transformer.
	5.	Motor (inoperative, check	5.	Replace motor/impeller assembly.
		resistances).
	6.	Door switch (open contacts).	6.	Replace door switch.
	7.	Door latch not making contact with	7.	Replace latch assembly.
		door switch.
	8.	Touch pad circuit defective.	8.	Replace console assembly.
	9.	No indicator lamps illuminate when	9.	Replace console assembly.
		START or OPTIONS are pressed.
Motor hums but will not start or	1. Motor (bad bearings or locked rotor).		1.	Replace motor.
run.	2. Motor stuck due to prolonged		2.	Rotate motor fan or impeller.
		non-use.
Motor trips out on internal thermal	1. Improper voltage.		1.	Check voltage.
overload protector.	2. Seal faces binding.		2.	Rotate motor fan or impeller, or
				replace.
	3.	Motor shaft binding.	3.	Clear blockage or replace.
	4.	Motor windings shorted.	4.	Replace motor/impeller assembly.
	5.	Glass or foreign items in pump.	5.	Clean and clear blockage.
Dishwasher runs but will not heat.	1. Heater element (open).		1.	Replace heater element.
	2.	Electronic control board defective.	2.	Replace control board.
	3.	Wiring or terminal defective.	3.	Repair or replace.
	4.	Hi-Limit thermostat defective.	4.	Replace thermostat.

Tub and Door Seal

		Detergent cover will not latch or	1.	Latch mechanism defective.	1.	Replace dispenser.
	The door seal is pressed into the tub channel for	without stretching or bunching. The gasket takes open.	2.	Electronic control board defective.	2.	Replace control board.
	an interference fit. Center the gasket (marked on	a short turn at the bottom of the tub channel	3.	Wiring or terminal defective.	3.	Repair or replace.
			4.	Broken spring(s).	4.	Replace dispenser.
	back) at the tub top center and press in place	before ending at the channel end wall.
			5.	Defective actuator.	5.	Replace actuator.

Pump Assembly

The pump assembly is driven by a 1/12 HP, shaded pole motor. Rotation is in the counterclockwise direction at 3100 to 3200 RPM. The motor drives a pump which supplies 100 percent filtered water at a rate of approximately 12 GPM to one spray arm at a time. The spray arm’s operation is alternated by small “pauses” of the motor during the wash cycle.

Draining is accomplished by using a small separate synchronous drain pump mounted to the side of the sump. The drain pump is connected to the main pump by a small rubber hose. The drain check valve is located at the entrance to the drain pump. The drain hose is attached by a worm gear clamp to the discharge of the drain pump. The drain is then routed up the side of the dishwasher and attached to the side of the tub. This drain loop insures that an air pocket cannot form near the drain pump and cause the pump to

air lock. The drain loop on the side of the tub must be kept in place after servicing.

The main pump can easily be removed by disconnecting the upper spray arm supply tube, the drain pump connector hose, and the wiring harness connections made at the circulation motor and the water heat thermistor located on the bottom of the pump.

Once the pump assembly is removed from the dishwasher, the motor/impeller assembly can be removed from the sump by taking out the three

(3) T-20 Torx head screws from the aluminum motor bracket and then the three (3) T-20 Torx head screws from the volute cover. Using a large flat head screwdriver inserted between the impeller screw and the sump’s volute, the motor/ impeller assembly can be gently pried out of the sump. Use the screwdriver as a lever.

900 Watt Heater

Refer to the cycle chart on the reverse side to	Voltage checks of the heater should be made in
determine when the heater is on during the wash	the dry portion of the service test mode.
cycle. The heater cycles ON and OFF for brief
periods during the drying cycle.

Gasket Cross Section

Mounting

Rib

Tub

Interior

Short Turn

Product Specifications

Electrical

Rating .................................. 120 Volts, 60Hz

Separate Circuit..15 amp min.- 20 amp max.

Motor (HP) .................................................		1/12
Motor (Amps) ...........................................		3.4
Heater Wattage .......................................		900
Total Amps (load rated)		......................... 11.0
TempAssure ................................		136°F ±5°F
(58°C±3°C)	[with outer door in place]
TempBoost ...............	144°F ±5°F (62°C ±3°C)
Heated Wash/Heated Rinse
Hi-Limit Thermostat ..................		200°F (93°C)

Water Supply

Suggested minimum incoming water

temperature ..............................	120°F (49°C)
Pressure (PSI) min./max. ...................	20/120
Connection (NPT) ......................................	3/8"

Consumption (Normal Cycle) ........................

......... 6.0 U.S. gal., 5.0 Imp. gal., 22.7 liters

Water valve flow rate (U.S. GPM)	.......... .83
Water recirculation rate (U.S. GPM) ..............
....................................................	approx. 12
Water fill time .....................................	87 sec.

Dishwasher will not pump out.	1. Drain restricted.		1.	Clear restrictions.
	2.	Electronic control board defective.	2.	Replace control board.
	3.	Defective drain pump.	3.	Replace pump.
	4.	Air lock in drain hose.	4.	Make sure hose is attached in proper
				position on side of tub.
	5.	Blocked impeller.	5.	Check for blockage, clear.
	6.	Open windings.	6.	Replace windings.
	7.	Wiring or terminal defective.	7.	Repair or replace.
Dishwasher will not fill with water.	1. Water supply turned off.		1.	Turn water supply on.
	2.	Defective water inlet fill valve.	2.	Replace water inlet fill valve.
	3.	Check fill valve screen for	3.	Disassemble and clean screen.
		obstructions.
	4.	Defective float switch.	4.	Repair or replace.
	5.	Electronic control board defective.	5.	Replace control board.
	6.	Wiring or terminal defective.	6.	Repair or replace.
	7.	Float stuck in “UP” position.	7.	Clean float.
Dishwasher water siphons out.	1. Drain hose (high) loop too low.		1.	Repair to proper height.
	2.	Drain line connected to a floor drain	2.	Install air gap at counter top.
		not vented.
	3.	Drain hose not connected to side of	3.	Reattach drain hose.
		tub.
Detergent left in dispenser.	1. Detergent allowed to stand too long		1.	Instruct customer/user.
		in dispenser.
	2.	Dispenser wet when detergent was	2.	Instruct customer/user.
		added.
	3.	Detergent cover held closed or	3.	Instruct customer/user on proper
		blocked by large dishes.		loading of dishes.
	4.	Improper incoming water	4.	Incoming water temperature of
		temperature to properly dissolve		120°F is required to properly
		detergent.		dissolve dishwashing detergents.
	5.	See "Detergent cover will not open."

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