Whirlpool WGD9500TC0 Parts Diagram

TECH SHEET - DO NOT DISCARD PAGE 1

WARNING

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

IMPORTANT

Electrostatic Discharge Sensitive

Electronics (ESD)

ESD problems are present everywhere. ESD may damage or weaken the machine control electronics. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.

Use an anti-static wrist strap. Connect

■

wrist strap to green ground connection point or unpainted metal in the appliance -ORTouch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.

Before removing the part from its package,

■

touch the anti-static bag to a green ground connection point or unpainted metal in the appliance.

■

Avoid touching electronic parts or terminal contacts; handle machine control electronics by edges only.

■

When repackaging failed machine control electronics in anti-static bag, observe above instructions.

DIAGNOSTIC GUIDE

Before servicing, check the following:

■

Make sure there is power at the wall outlet.

■

Has a household fuse blown or circuit breaker tripped? Time delay fuse?

■

Is dryer vent properly installed and clear of lint or obstructions?

■

All tests/checks should be made with a VOM (volt-ohm-milliammeter) or DVM (digitalvoltmeter) having a sensitivity of 20,000 Ω per volt DC or greater.

■

Check all connections before replacing components. Look for broken or loose wires, failed terminals, or wires not pressed into connectors far enough.

■

A potential cause of a control not functioning is corrosion on connections. Observe connections and check for continuity with an ohmmeter.

■

Connectors: Look at top of connector. Check forbrokenorloosewires.Check for wires not

pressed into connector far enough to engage metal barbs.

Resistance checks must be made with dryer

■

unplugged or power disconnected.

DIAGNOSTIC TESTS

These tests allow service personnel to test and verify all inputs to the machine control electronics. You may want to do a quick and overall checkup of the dryer with these tests before going to specific troubleshooting tests.

ACTIVATING THE SERVICE DIAGNOSTIC TEST MODE

1. Be sure the dryer is in standby mode (plugged

in with all indicators off, or with only the Done indicator on).

2. Select any one button (except Pause/Cancel)

and follow the steps below, using the same button (remember the button):

Press/ hold 2

seconds

Release

➔

seconds

for 2

➔

seconds

Press/ hold 2

Release

➔

seconds

for 2

➔

seconds

Press/ hold 2

3. If this test mode has been entered successfully,

all indicators on the console are illuminated for 5 seconds with

8:88 showing in the Estimated

Time Remaining three-digit display. If there are no saved fault codes or active fault codes, all indicators on the console will momentarily turn off, then stay on with

8:88 displayed. Continue

with diagnostics.

4. If entry into Diagnostic Test Mode is

unsuccessful, choose a different button (except Pause/Cancel) and repeat step 2.

➔

If no indicators come on after repeating step 2 using a different button, go to TEST #1, page 4.

DIAGNOSTIC: Active Fault Codes

If there is an active fault code, it will be flashing in the display. Review the Display Fault/Error Codes table, page 3, for the recommended procedure.

If there is no active fault code,

8:88 will be

displayed and all of the indicator lights will be turned on.

DIAGNOSTIC: Saved Fault Codes

If there are saved fault codes, the most recent fault code will show “F:” and flash “XX” where XX is the fault code.

Press and release the same button used to activate diagnostics

Repeat

beep

➔

beep

➔

beep

➔

All indicators momentarily turn

➔

off, then stay on.

tone

➔

Second most recent fault code is displayed.

Third most recent fault code is displayed.

Fourth most recent fault code is displayed.

DIAGNOSTIC: Console Buttons and Indicators

Pressing buttons and rotating the cycle selector will turn off the corresponding indicator and sound a beep as shown in figure 1, page 2.

Pressing (more time) will toggle the left

✔

digit and colon on the display while sounding a beep.

Pressing (less time) will toggle the right

✔

two digits on the display while sounding a beep.

Pressing the Wrinkle Shield button will

✔

activate the Inlet Air Flow Test. See DIAGNOSTIC: Displaying Inlet Air Flow, page 2.

Pressing the Cycle Signal button will

✔

activate the Line Voltage Test. See DIAGNOSTIC: Displaying Line Voltage, page 2.

If indicators fail to come on and beep after

➔

pressing buttons and rotating the cycle selector, go to TEST #7, page 8.

DIAGNOSTIC: Door Switch

Opening the door should cause a beep and an alphanumeric number (such as

P:3E ) to be

displayed. Closing the door should cause a beep and

8:88 to be displayed.

If opening the door fails to cause a beep and a

➔

number and letter to be displayed, go to TEST #8, page 9.

NOTE: Opening the door while in Diagnostic Test Mode may not activate the drum light. The light will come on when Start is pressed, or upon opening the door after the Diagnostic Test Mode has been canceled.

DIAGNOSTIC: Moisture Sensor

1. Open the door and locate two metal strips on

the inside of the dryer. Using a wet cloth or one finger, jointly touch both strips.

➔

If a continuous beep tone is heard and an alphanumeric number is displayed on the console, the sensor is OK.

➔

If a continuous beep tone is not heard, or if a continuous beep tone is heard before touching both moisture strips, go to step 2.

2. Check to see if there is water in the dryer

around the moisture strips.

➔

If no water is present, go to TEST #5, page 8.

➔

If water is present, wipe the strips off with a dry cloth and repeat step 1.

➔

If wiping the strips does not stop the beeping, run a timed dry cycle for 2 minutes to dry out the drum, then repeat this diagnostic test.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10050531A

TECH SHEET - DO NOT DISCARD PAGE 2

Power button controls

its own indicator and

Cycle Status LEDs.

Controls Lock/Unlock button

controls LED below button.

Figure 1. Console Diagnostics.

Start button controls its own indicator,

starts dryer and displays version information.

Rotating this Cycle

Selector turns cycle

LEDs on or off.

Tur ns off all

LEDs and exits

diagnostics.

“Less Time” button

turns the middle and

Drum Light button

controls LED below button.

right digit of the

display on or off.

Each button

controls all LEDs

above button

(Amber-Off-Green).

“More Time” button

turns the left digit

and colon of the

display on or off.

Cycle Signal button

controls all LEDs

above button

(Amber-Off-Green)

and starts displaying

Line Voltage Diagnostic.

Wrinkle Shield button

controls its own indicator

and starts Inlet

Air Flow Diagnostic.

Button

Button Sound button

controls all LEDs

above button

(Amber-Off-Green).

DIAGNOSTIC: Motor, Heater, Water, Drum Light and Console ID

Close the door. Press the Start button. The motor, heater, drum light, and water valve will turn on. Continuing to press the Start button will display the project codes and software revisions. These codes are not relevant to the service of the machine and can be ignored.

NOTE: The console buttons only control the indicator lights in Diagnostic Test Mode. When the buttons are pressed the corresponding features will not be activated.

➔

If the motor does not turn on, go to TEST #3, page 5.

➔

If no heat is detected, go to TEST #4, page 6.

➔

If no water is detected, go to TEST #9, page 9.

NOTE: Press Pause/Cancel when the test is complete to turn off the machine. If the machine is left running in Diagnostic Test Mode, water will build up in the drum.

DIAGNOSTIC: Displaying Inlet Air Flow

Used to display the air flow value at the inlet of the heater box being measured by the machine control.

After entering the Diagnostic Test Mode, waiting for the 5 second delay, and cycling through any saved fault codes, press the Wrinkle Shield button to activate air flow detection. A 30 or 50 second countdown timer will start and the dryer will turn on.

➔

If the dryer is cold, the countdown will start at 50 seconds.

NOTE: If the dryer is extremely cold (less than 40°F[4.4°C]) the air flow may not be detected properly, and “--” will be displayed.

If the dryer is hot, the countdown timer will

➔

start at 30 seconds (cool down period) followed by an additional 50 second countdown.

A Dryness Level modifier LED will also be illuminated to indicate the air flow range corresponding to the number displayed.

■

The MoreLEDwillbe illuminated for air flow readings above 40 cfm.

■

The Normal LED will be illuminated for air flow readings between 29 and 40 cfm.

■

The Less LED will be illuminated for air flow readings less than 29 cfm.

➔

If air flow value is low (Less LED is lit), check to make sure the lint screen is clean, the door seal is in place and the vent is not obstructed.

DIAGNOSTIC: Displaying Line Voltage

Used to display the line voltage currently being measured by the machine control:

After entering the Diagnostic Test Mode, waiting for the 5 second delay, and cycling through any saved fault codes, press the Cycle Signal button. The voltage value will be displayed.

➔

If the line voltage is not seen on L2, the display will flash

L2. Go to TEST #1, page 4.

DEACTIVATING THE DIAGNOSTIC TEST MODE

Press the Pause/Cancel button to exit diagnostics.

ACTIVATING THE MANUAL LOAD TEST

1. Be sure the dryer is in standby mode (plugged

in with all indicators off, or with only the Done indicator on).

2. Select any one button (except Pause/Cancel)

and follow the steps below, using the same button (remember the button):

a. Press/hold 2 seconds b. Release for 2 seconds c. Press/hold 2 seconds d. Release for 2 seconds e. Press/hold 2 seconds f. Release for 2 seconds g. Press/hold 2 seconds

The motor starts right away, the “Steam” Status LED comes on, and “0” (zero) is displayed (this step starts the Manual Load sequence):

Motor turns

1. on.

“Steam” Status

➔

LED turns on.

0:00 is

➔

displayed.

Now press any key (except Pause/Cancel) and the control will advance through each step of the following sequence:

Motor + heater.

Motor + heater

3. + water valve.

Motor + heater

+ water valve + drum light.

All loads turn

5. off.

“Wet” Status

➔

LED turns on.

“Damp”

➔

Status LED turns on.

“Cool Down”

➔

Status LED turns on.

“Done” Status

➔

LED turns on.

➔

0:01 is displayed.

0:02 is displayed.

0:03 is displayed.

0:04 is displayed.

DEACTIVATING THE MANUAL LOAD TEST

Press the Pause/Cancel button to exit this mode.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10050531A

TECH SHEET - DO NOT DISCARD PAGE 3

DISPLAY FAULT/ERROR CODES

The fault codes below would be indicated when attempting to start a drying cycle, or after activating the Diagnostic Test Mode.

Display Description Explanation / Recommended Procedure

PF flashes to indicate that a power failure

F:01

F:02

F:20

F:22

F:23

F:24

F:25

F:26

F:28

F:29

Power Failure

Low Line

Voltage

Low Air Flow

Condition

Primary Control

Failure

Keypad/

User Interface

Failure

Heater Failure

Outlet

Thermistor

Open

Outlet

Thermistor

Shorted

Inlet

Thermistor

Open

Inlet

Thermistor

Shorted

Motor Drive

System Failure

Moisture

Sensor Open

Moisture

Sensor

Shorted

occurred while the dryer was running.

■

Press Start to continue the cycle, or press Pause/Cancel to clear the display.

L2 flashes if low line voltage (less than 30 V) is detected at installation.

■

Check to see if a household fuse has blown or a circuit breaker has tripped.

■

Confirm the power cord is properly installed and plugged into the power outlet.

■

Check the relay connections on the electronic control.

AF flashes if low inlet air flow is detected at install.

■

Check to see if the vent run from the dryer to the wall is crushed.

■

Perform steps under DIAGNOSTIC: Displaying Inlet Air Flow, page 2.

F:01 flashes when there is a primary control failure.

■

Replace the machine control electronics. See Accessing & Removing the Electronic Assemblies, page 9.

F:02 flashes when there is a stuck button or user interface mismatch. This fault code appears ONLY when in the Diagnostic Test Mode.

■

See TEST #7, page 8.

F:20 flashes if no voltage is detected at the heater relay.

■

Check that the wires are plugged in on the heater element and at the relay on the electronic control. This fault code appears ONLY when in the Diagnostic Test Mode.

F:22 flashes if the outlet thermistor is open.

■

See TEST #4a, page 7.

F:23 flashes if the outlet thermistor has shorted.

■

See TEST #4a, page 7.

F:24 flashes if the inlet thermistor is open. This fault code appears ONLY when in the Diagnostic Test Mode.

■

See TEST #4a, page 7.

F:25 flashes if the inlet thermistor is shorted. This fault code appears ONLY when in the Diagnostic Test Mode.

■

See TEST #4a, page 7.

F:26 flashes if there is a motor drive system failure.

■

See TEST #3, page 5.

F:28 flashes if the moisture sensor strip is open. This fault code appears ONLY when in the Diagnostic Test Mode.

■

See TEST #5, page 8.

F:29 flashes if the moisture sensor strip has shorted. This fault code appears ONLY when in the Diagnostic Test Mode.

■

See TEST #5, page 8.

See Accessing & Removing the Electronic Assemblies, page 9, to access:

■

Machine Control Electronics

■

UI Power Cube

■

Console Electronics and Housing

See Removing the Back Panel, page 11, to access:

■

Drum Light Assembly

■

Water Nozzle

■

Blower Motor Assembly

■

Water Valve

Door

Switch

See Removing the Toe Panel, page 9, to access:

■

Moisture Sensors

■

Outlet Thermistor

■

Thermal Cut-off

■

Inlet Thermistor/High Limit Thermostat Assembly (Electric Models)

High Limit Thermostat (Gas Models)

■

Heater Assembly (Electric or Gas)

■

Thermal Fuse

■

Moisture Sensor

Strips

Heater

Assembly

Figure 2. Component locations.

Display Description Explanation / Recommended Procedure

F:30 flashes if a restricted air flow condition exists. This fault code appears ONLY when in the Diagnostic Test Mode.

■

Check to make sure the lint screen is clean, the door seal is in place and the vent is not obstructed.

■

See DIAGNOSTIC: Displaying Inlet Air Flow, page 2.

F:30

Restricted

Air Flow

Condition

F:31 flashes if a low voltage condition (less than 30 V) has

been detected. This fault code appears ONLY when in the Diagnostic Test Mode.

■

F:31

L2 Line Voltage

Error

Check to see if a household fuse has blown or a circuit breaker has tripped.

■

Confirm the power cord is properly installed and plugged into the power outlet.

■

Check the relay connections on the electronic control.

F:50 flashes if no voltage is detected at the water valve relay.

F:50

Water Valve

Failure

■

Check that the wires are plugged in on the valve and at the relay on the electronic control. This fault code appears ONLY when in the Diagnostic Test Mode.

F:70 / F:71 flashes when there is no communication between the machine control and the console electronics.

■

Check console electronics harness connections to the machine control.

■

Replace the machine control electronics. See Accessing & Removing the Electronic Assemblies, page 9.

F:72 through F:78 flashes when there is a console electronics failure.

■

Replace the console electronics. See Accessing & Removing the Electronic Assemblies, page 9.

F:70

F:71

F:72

through

F:78

Communication

Between

Electronic

Assemblies

Console

Electronics

Failure

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10050531A

TECH SHEET - DO NOT DISCARD PAGE 4

TROUBLESHOOTING GUIDE

Some tests will require accessing components.

Problem

NOTE: Possible Cause/Tests MUST be performed

in the sequence shown for each problem.

Won’t power up.

(No response when buttons are pressed.)

1. Supply connections. See TEST #1, at right.

2. Check harness connections.

3. Console electronics and housing assembly. See TEST #7, page 8.

Won’t start cycle when Start button is pressed.

1. If number display flashes, check to be sure the door is completely shut, and press and hold down Start for about 1 second.

2. See TEST #3, page 5.

3. See TEST #8, page 9.

Won’t shut off when expected.

1. Check Pause/Cancel button.

2. Console electronics and housing assembly. See TEST #7, page 8.

3. Moisture sensor. See TEST #5, page 8.

Control won’t accept selections.

Console electronics and housing assembly. See TEST #7, page 8.

Won’t heat.

1. Heater. See TEST #4, page 6.

2. Check harness connections.

3. See DIAGNOSTIC: Displaying Line Voltage, page 2.

4. Check installation.

Heats in air cycle.

Heater. See TEST #4, page 6.

Shuts off before clothes are dry.

1. Check the dryness setting for auto cycles.

2. Check for full lint screen.

3. See DIAGNOSTIC: Displaying Inlet Air Flow, page 2.

4. Check for clogged vent.

5. Moisture sensor. See TEST #5, page 8.

6. Dryness level adjust. See TEST #5a, page 8.

Pushing Power button causes dryer to beep, but no indicators light.

1. Check console electronics harness connections to the machine control.

2. Replace machine control electronics. See Accessing & Removing the Electronic Assemblies, page 9.

Water not dispensing.

1. Make sure a “Steam” cycle (either Quick Refresh or Enhanced Touch Up) is selected.

2. See TEST #9, page 9.

Possible Cause / Test

TROUBLESHOOTING TESTS

NOTE: These checks are done with the dryer unplugged or disconnected from power.

TEST #1 Supply Connections

This test assumes that proper voltage is present at the outlet, and visual inspection indicates that the power cord is securely fastened to the terminal block (electric dryer) or wire harness connection (gas dryer).

Remove

Screw

Cover Plate

Figure 3. Remove the cover plate.

ELECTRIC DRYER:

1. Unplug dryer or disconnect power.

2. Remove the cover plate from the top right

corner of the back of the dryer. See figure 3.

3. With an ohmmeter, check for continuity

between the neutral (N) terminal of the plug and the center contact on the terminal block. See figure 4.

➔

If there is no continuity, replace the power cord and test the dryer.

➔

If there is continuity, go to step 4.

4. In a similar way, check which terminal of the

plug is connected to the left-most contact on the terminal block and make a note of it. This will be L1 (black wire) in the wiring diagram. See figure 4.

Power Cord

Plug

COM

Figure 4. Plug-to-terminal connections for electric dryer.

➔

When this is found, go to step 5.

➔

If neither of the plug terminals have continuity with the left-most contact of the terminal block, replace the power cord and test the dryer.

5. Access the machine control electronics without

disconnecting any wiring to the control board. See Accessing & Removing the Electronic Assemblies, page 9.

Te r m i nal Block

6. With an ohmmeter, check for continuity

between the L1 terminal of the plug (found in step 4) and P9-2 (black wire) on the machine control board. See figure 18, page 10.

If there is continuity, go to step 7.

➔

If there is no continuity, check that wires to

➔

the terminal block are mechanically secure. If so, replace the main wire harness and test the dryer.

7. Check for continuity between the neutral (N)

terminal of the plug and P8-3 (white wire) on the machine control board.

If there is continuity, go to step 8.

➔

If there is no continuity and the mechanical

➔

connections of the wire are secure, replace the main wire harness.

8. Visually check that the P5 connector is

inserted all the way into the machine control electronics.

9. Visually check that the console electronics and

housing assembly is properly inserted into the front console.

10. If both visual checks pass, replace the

console electronics and housing assembly.

11. Plug in dryer or reconnect power.

12. Per form steps under DIAGNOSTIC: Console

Buttons and Indicators, page 1, to verify repair.

13. If indicators still do not light, perform

TEST #2, page 5.

GAS DRYER:

1. Unplug dryer or disconnect power.

2. Remove the cover plate from the top right

corner of the back of the dryer. See figure 3.

3. Check that the power cord is firmly connected

to the dryer’s wire harness. See figure 5.

Wire

Harness

Power Cord

Figure 5. Power cord-to-wire harness connection for gas dryer.

4. Access the machine control electronics without

disconnecting any wiring to the control board. See figure 17, page 10.

5. With an ohmmeter, check for continuity

between the neutral (N) terminal of the plug and P8-3 (white wire) on the machine control board. The left-hand side of figure 6 shows the position of the neutral terminal (N) on the power cord plug. Also see figure 18, page 10.

➔

If there is continuity, go to step 6.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10050531A

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