Skip to main contentStart diagnosing F3C on your Whirlpool hood
What this code means
Cavity temperature sensor failure.
First step from the service manual
Unplug microwave oven or disconnect power, then check cavity temperature sensor connection.
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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Access Whirlpool hood service manuals, wiring schematics, exploded parts views, and error code references on MyPros+.