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Error code reference
Whirlpool Refrigerator Error Code 4
Multiple failures: compressor, heater, and thermistor failures.
SourceWhirlpool Refrigerator - Tech Sheet: Service Diagnostics & Components (W11408463)Component Tests / Fail Condition chart
Diagnostic procedure
The full 4 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Verify incoming power to ACU (120 VAC between P1-5 and P1-7); replace main board if power is correct.
SourceWhirlpool Counter Depth Top Mount - Service Manual (W11397203)p. 2-3
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
3 manuals in the MyPros+ library document this code for Whirlpool refrigerator.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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