Fan Error
4d21
No reverse airflow fan rotation (no/low RPM)
Whirlpool Oven 4d21 Error Code Error Code Possible Causes
- The oven fan motor is defective.
- The oven control PCB is defective.
- Wiring issue between the oven fan motor and the control PCB.
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This information is provided for educational purposes only. Please consult the appropriate Service Mode or Technical Document for your model. Always take proper safety precautions when installing or repairing any major appliance.