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TECH SHEET - DO NOT DISCARD
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 (ESD) Sensitive
Electronics
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
-OR-
Touch 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 (digital-voltmeter)
having a sensitivity of 20,000 ohms 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 for
broken or loose wires. Check for wires not pressed
into connector far enough to engage metal barbs.
Resistance checks must be made with dryer
unplugged or power disconnected.
FOR SERVICE TECHNICIAN'S USE ONLY
DIAGNOSTIC TESTS
These tests allow factory or 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 DIAGNOSTIC TEST MODE
1. Be sure the dryer is in standby mode (plugged in with all indicators off,
or with only the Clothes Dry indicator on).
2. Select any one button (except Pause/Cancel) and follow the steps below,
using the same button (remember the button):
Press/hold
Release for
2-5 seconds
2-5 seconds
3. If this test mode has been entered successfully, all indicators on the
console are illuminated for 5 seconds with
Time Remaining two-digit display.
DIAGNOSTIC: Unsuccessful Entry
If entry into diagnostic mode is unsuccessful, press the Pause/Cancel
button twice, then press the Power button.
If indicators come on, try to use a different button than was used to
activate the diagnostic test mode. If that button fails to enter the
diagnostic mode, something is faulty, and it is not possible to enter the
diagnostic mode. Go to TEST #2, page 6.
If no indicators come on after pressing the Power button, go to TEST #1,
page 6.
DIAGNOSTIC: Saved Fault Codes
If there are saved fault codes, the most recent fault code will alternately
show "F-" and "XX" where XX is the fault code.
Press and release the
same button used to
beep tone
activate Diagnostics
Repeat
beep tone
Repeat
beep tone
Repeat
All indicators momentarily turn off, then stay on.
DIAGNOSTIC: Console Buttons and Indicators
Pressing the console buttons or rotating the cycle selector will sound a
beep and will turn on or off the corresponding indicators as shown in
Figure 1, Console Diagnostics, page 2. Pressing Time Adjust
time) will sound a beep and turn the left digit of the display on or off.
Pressing Time Adjust
(less time) will sound a beep and turn the right
digit of the display on or off.
If indicators fail to turn on or off and beep after pressing buttons or
rotating the cycle selector, go to TEST #6, page 9.
DIAGNOSTIC: Door Switch
Opening the door should cause a beep and an alphanumeric number to be
displayed. Closing the door should cause a beep and
If opening the door fails to cause a beep and a number and letter to be
displayed, go to TEST #7, page 10.
DIAGNOSTIC: Moisture Sensor
Open the door and locate two metal strips on the inside of the dryer. Bridge
these strips with a wet cloth or a finger.
If a continuous beep tone is heard and an alphanumeric number is
displayed on the console, the sensor is OK.
If not, or if a continuous beep tone is heard before bridging the moisture
strips, go to TEST #5, page 9.
Press/hold
Release for
2-5 seconds
2-5 seconds
88
showing in the Estimated
Second most recent fault code is displayed.
Third most recent fault code is displayed.
Fourth most recent fault code is displayed.
88
to be displayed.
PART NO. W10054160
PAGE 1
Press/hold
2-5 seconds
(more
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Table of Contents
Troubleshooting
Related Manuals for Whirlpool WGD6400SW0
Summary of Contents for Whirlpool WGD6400SW0
- Page 1 TECH SHEET - DO NOT DISCARD PAGE 1 WARNING DIAGNOSTIC TESTS These tests allow factory or service personnel to test and verify all inputs to Electrical Shock Hazard the machine control electronics. You may want to do a quick and overall Disconnect power before servicing.
- Page 2 TECH SHEET - DO NOT DISCARD PAGE 2 Power button controls Start button turns on dryer. Status indicators at right. Rotating knob turns indicators on or off. “Less Time” button “More Time” button Dryness button controls Temperature button controls Each button controls Turns off all indicators and turns the right digit of turns the left digit of...
-
Page 3: Display Fault Codes
TECH SHEET - DO NOT DISCARD PAGE 3 DISPLAY FAULT 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 occurred while the dryer was Power Failure running. - Page 4 TECH SHEET - DO NOT DISCARD PAGE 4 GAS DRYER WIRING DIAGRAM IMPORTANT: Electrostatic (static electricity) discharge may cause damage to machine control electronics. See page 1 for details. L1 LINE – BK W – NEUTRAL N 120 VOLTS P8-1 P8-3 NEUTRAL LAMP LOAD NEUTRAL...
- Page 5 TECH SHEET - DO NOT DISCARD PAGE 5 DRIVE MOTOR STRIP CIRCUIT L1 LINE – BK W – NEUTRAL N 120 VOLTS P8-4 P9-2 DOOR DOOR SWITCH MACHINE CONTROL ELECTRONICS CENTRIFUGAL SWITCH MAIN 1.4–2.6 Ω P9-1 MOTOR START BELT 1.4–2.8 Ω SWITCH DRIVE MOTOR 1/3 H.P .
-
Page 6: Troubleshooting Tests
TECH SHEET - DO NOT DISCARD PAGE 6 open circuit is found, replace the If the drum light illuminates, then TROUBLESHOOTING TESTS power cord. Otherwise, go to step 6. power is present at the machine NOTE: These checks are done with the control. - Page 7 TECH SHEET - DO NOT DISCARD PAGE 7 If the resistance at the motor is TEST #4 Heater correct, there is an open circuit between the motor and machine This test is performed when either of the control electronics. Check for failed following situations occur: belt switch.
- Page 8 TECH SHEET - DO NOT DISCARD PAGE 8 If there is an open circuit, replace the If wire connections are OK, check TEST #4b Thermal Fuse high limit thermostat and thermal the exhaust thermistor resistance per cut-off. step 5. The thermal fuse is wired in series with the dryer drive motor.
- Page 9 TECH SHEET - DO NOT DISCARD PAGE 9 TEST #5 Moisture Sensor TEST #6 Buttons and Sensor Harness Indicators with MOVs NOTE: This test is started with the Sensor (Metal Oxide machine completely assembled. Connector This test is performed when any of the Varistors) following situations occurs during the This test is performed when an automatic...
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Page 10: Adjusting Customer-Focused Drying Modes
TECH SHEET - DO NOT DISCARD PAGE 10 Perform the Console Buttons and 6. Slowly rotate top backwards and lean ADJUSTING Indicators Diagnostic test, page 1 against wall, or support with a prop rod. CUSTOMER-FOCUSED to verify repair. 7. Disconnect the door switch wire DRYING MODES Some buttons do not light harness located on the right side. -
Page 11: Removing The Back Panel
TECH SHEET - DO NOT DISCARD PAGE 11 ACCESSING & REMOVING N.O. Heater Motor THE ELECTRONIC Yellow-Red Blue Black Black Relay 1 Relay ASSEMBLIES There are two electronic assemblies; the machine control electronics and the user interface electronics. See figures 15 and 16. - Page 12 TECH SHEET - DO NOT DISCARD PAGE 12 SOFTWARE COPYRIGHTED. MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS: 4,669,200 4,989,347 6,446,357 D314,261 4,700,495 5,066,050 6,597,144 D314,262 4,754,556 5,560,120 6,604,298 D457,991 4,840,285 5,809,828 6,685,241 D457,992 4,865,366 6,020,698 6,732,447 D495,453 4,899,464 6,047,486 6,784,673...