The 1F error on your Frigidaire means the freezer temperature sensor (thermistor) is sending a faulty or out-of-range signal to the main control board. This usually points to a wiring problem or a failing sensor, and it often needs a multimeter check or a replacement part to fix.

Error code 1F
Meaning Freezer temperature sensor fault or open/shorted circuit
Severity Medium — freezer may stop cooling correctly if left unresolved
Time to fix 15–45 minutes
Tools needed Multimeter, screwdriver

What the 1F error means

The 1F code appears when the control board can’t get a reliable reading from the freezer’s temperature sensor. This sensor tells the board how cold the freezer compartment is, so it can cycle the compressor and fan correctly. When the signal is missing, too high, or too low, the board flags it as an error and may stop normal cooling cycles as a safety measure.

This is similar in nature to other sensor-related faults on Frigidaire appliances, such as the issues covered in the Frigidaire EF Error Code: Causes and Fixes guide, where a faulty sensor or connection triggers a similar chain reaction.

Common causes

  • Faulty or worn-out freezer temperature sensor (thermistor)
  • Loose, corroded, or disconnected wiring harness at the sensor
  • Moisture or frost buildup around the sensor connection
  • Damaged wire caused by ice expansion or rodent damage
  • Main control board failure misreading a working sensor
  • Power surge that temporarily disrupted sensor communication

How to fix the 1F error

  1. Power cycle the freezer: Unplug the unit for 5 minutes, then plug it back in. This clears temporary faults and lets the board re-read the sensor.
  2. Locate and inspect the sensor: Find the freezer temperature sensor, usually mounted near the evaporator coil or inside wall. Check for visible damage, frost, or loose wiring.
  3. Test the sensor with a multimeter: Disconnect the sensor and measure its resistance. Compare the reading to Frigidaire’s spec chart for your model — a reading far outside range confirms a faulty sensor.
  4. Check wiring connections: Reseat the connector at both the sensor and the control board. Look for corrosion, bent pins, or chewed wires along the harness.
  5. Replace the sensor if faulty: If the multimeter test fails, order the correct replacement part for your model and swap it in, making sure the connector clicks fully into place.
  6. Call a technician if the error persists: If a new sensor doesn’t clear the code, the main control board may be at fault and should be tested or replaced by a professional.

FAQ

Can I keep using my freezer with a 1F error showing?
You can, but cooling may become unreliable, so it’s best to fix it soon before food spoils.

How do I find the exact sensor part for my Frigidaire model?
Check the model number on the inside wall or door frame and look it up on Frigidaire’s official parts site or with an authorized parts dealer.

Is the 1F error the same as other Frigidaire sensor codes?
No, each letter-number combination points to a different sensor or component, similar to how the Frigidaire CA Error Code: Causes and Fixes and Frigidaire CE Error Code: Causes and Fixes guides cover separate faults.