Error Code 66
Inverter board is too hot
Moderate
Address soon - your appliance may not work properly
Also displayed as: F/R
What This Means
Continuous high current operation; Ambient temperature too high; Inadequate heatsink cooling; IPM device or discrete IC overheating
What actually causes this:
Machine compartment is too warm or lacks proper airflow
First Thing to Check
Check that back of refrigerator has at least 2 inches clearance
Parts Involved
How to Fix
- 1
1. Check ambient temperature around machine compartment
- 2
2. Ensure machine compartment has adequate airflow
- 3
3. Measure IPM heatsink temperature
- 4
4. Wait for temperature to cool before retry
Other Error Codes for RF22A4220SR
Control panel cannot talk to main circuit board
Main board cannot control the compressor
Freezer is not cold enough
Cannot detect compressor motor position
Humidity level cannot be monitored
Water in dispenser tank cannot be heated
Compressor protection circuit activated
Power supply is too high