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Error code reference
Whirlpool Microwave Error Code E4
Oven temp too high.
SourceWhirlpool Microwave - Tech Sheet: GMC275PDB1p. 2
Diagnostic procedure
The full E4 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
If sensor resistance and connections are good, then the oven cavity temperature must have exceeded a safe level. Check for welded-closed relays on the control.
SourceWhirlpool Microwave - Tech Sheet: GMC275PDB1p. 2
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
1 manual in the MyPros+ library documents this code for Whirlpool microwave.
Models covered by the manuals that document this code
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