How to Fix Whirlpool Refrigerator Error Er 20F

Error Code: Refrigerator Difficulty: Hard

Problem: Control board watchdog timer failure – processor locked up

How to Fix Refrigerator Error

1. Unplug refrigerator for 10 minutes to fully reset processor.
2. Remove rear access panel to access main control board.
3. Inspect board for signs of overheating (discolored components near processor).
4. Check ventilation around control compartment – ensure no dust buildup blocking airflow.
5. Verify ambient temperature isn’t exceeding 120°F near control board location.
6. Test all input devices (door switches, temperature sensors) for intermittent shorts that could crash processor.
7. If no external causes found and error recurs within 3 cooling cycles, control board processor has failed.
8. Replace main control board assembly W
9. During installation, ensure board mounting screws are tight to provide proper heat sinking.
10. After replacement, monitor refrigerator through 3 complete cooling cycles to confirm stability. Document any power interruptions that preceded failure – may indicate need for surge protection.