The Frigidaire Refrigerator code OP means: Sensor open - a temperature sensor (thermistor) circuit is broken, so the board loses that thermometer and falls back to timed cooling; temperatures swing wider than the display admits.
Difficulty: Moderate — DIY-able with basic tools
Typical repair cost: approximately $200 (parts + labor).
What to do, step by step
- Unplug for 5 minutes and restart.
- Locate the affected thermistor.
- Test its resistance - an open circuit confirms failure.
- Replace the sensor.
Video walkthrough
Is the repair worth it?
Before spending money, run the numbers: if the repair quote is more than about 30% of what a new refrigerator costs — especially on an older unit — replacement is usually the smarter call.
Check your quote with our free calculator →
Other Frigidaire error codes
Decoding a different code? Our error code lookup tool covers 200+ codes across all major brands.
Safety first: unplug the appliance (and shut off gas where applicable) before any inspection. If you smell gas, leave the area and call your gas provider.