Whirlpool WGD9450WL2 Documentation Technique

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
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
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connection point or unpainted metal in the appliance.
Touch your finger repeatedly to a green ground connection point or
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unpainted metal in the appliance.
Before removing the part from its package, touch the anti-static bag
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to a green ground connection point or unpainted metal in the appliance.
Avoid touching electronic parts or terminal contacts; handle electronic
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control assembly by edges only.
When repackaging failed machine control electronics in anti-static bag,
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observe above instructions.
DIAGNOSTIC GUIDE
Before servicing, check the following:
Make sure there is power at the wall outlet.
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Has a household fuse blown or circuit breaker
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tripped? Was a regular fuse used? Use a time-
delay fuse.
Is dryer vent properly installed and clear of lint
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or other obstructions?
All tests/checks should be made with
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a VOM (volt-ohm-milliammeter) or DVM
(digital-voltmeter) having a sensitivity
of 20,000 per volt DC or greater.
Check all connections before replacing
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components. Look for broken or loose wires,
failed terminals, or wires not pressed into
connectors far enough.
PART NO. W10298850A
IMPORTANT
Electrostatic Discharge (ESD)
Sensitive Electronics
-OR-
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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.
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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.