The FF error on your Frigidaire means the freezer compartment sensor has detected a temperature that’s too high, or the sensor itself has failed. Check that the freezer door is closing properly and the vents aren’t blocked before assuming a part has failed.

Error code FF
Meaning Freezer temperature sensor fault or the freezer is running warmer than it should
Severity Medium — food safety risk if freezer is actually warm, but often a simple fix
Time to fix 10–40 minutes
Tools needed Multimeter (for sensor testing), None for basic checks

What the FF error means

FF stands for “Freezer Failure” or “Freezer Fault” on most Frigidaire freezer and refrigerator-freezer combo units. It appears when the control board detects that the freezer compartment isn’t reaching or holding its set temperature, or when the freezer thermistor (temperature sensor) sends a reading outside the normal range. This is similar in nature to the Frigidaire EF Error Code, which flags a related evaporator fan issue.

The code is a warning, not necessarily a breakdown. Sometimes it clears itself once the door seal issue or airflow blockage is resolved. Other times it points to a genuine sensor or compressor problem that needs a technician.

Common causes

  • Freezer door left open or not sealing properly, letting warm air in
  • Frost buildup blocking the evaporator coils or air vents
  • Faulty freezer thermistor sending incorrect temperature data
  • Recent power outage causing the unit to still be cooling back down
  • Overloaded freezer blocking internal air circulation
  • Failing evaporator fan motor not circulating cold air properly

How to fix the FF error

  1. Check the door seal — Open and close the freezer door firmly. Look for gaps, ice buildup, or debris on the gasket that could stop it sealing tight.
  2. Clear space around vents — Remove any food packages blocking the internal air vents or pressed against the back wall where the evaporator coil sits.
  3. Wait it out after a power cut — If the power went out recently, give the unit 24 hours to recover before troubleshooting further, since FF can appear during this recovery period.
  4. Reset the freezer — Unplug the unit for 5 minutes, then plug it back in. This forces the control board to re-read the sensors and can clear a stuck error.
  5. Test the thermistor — With a multimeter, check the freezer sensor’s resistance against Frigidaire’s spec sheet for your model. A reading far outside range confirms it needs replacing.
  6. Call a technician — If the error persists after a reset and the door and vents check out fine, the sensor, control board, or evaporator fan likely needs professional repair or replacement.

FAQ

Is it safe to keep food in the freezer when FF appears?
Check the actual temperature with a separate thermometer. If it reads above 0°F (-18°C), move food to another freezer or a cooler with ice packs until the issue is fixed.

Will unplugging the freezer fix the FF error permanently?
A reset often clears the code temporarily, but if the underlying cause is a bad sensor or blocked vent, the error will come back unless you address that root problem.

How is FF different from other Frigidaire fault codes?
FF is specific to the freezer compartment sensor and temperature, while codes like the Frigidaire EC Error Code or Frigidaire CA Error Code relate to different sensors or communication faults elsewhere in the appliance.