Frigidaire E1 Error Code: Causes and Fixes

The E1 error on your Frigidaire means the freezer temperature sensor (thermistor) has failed or is sending a signal outside the normal range. Most owners can clear this by checking the sensor wiring and connections before calling for service.

What the E1 error means

The E1 code appears on Frigidaire freezers when the control board can’t get a valid reading from the freezer temperature sensor. This sensor tells the control board how cold the freezer compartment is, so it can cycle the compressor and fans correctly. When the reading is missing, too high, or too low, the board flags E1 and may pause normal cooling as a safety measure.

This is a different fault path from the sensor issues covered in the Frigidaire EF Error Code: Causes and Fixes guide, but the diagnostic approach — checking wiring and connections first — is similar.

Common causes

• Faulty or failed freezer temperature sensor (thermistor)
• Loose or disconnected sensor wiring harness
• Corroded or damaged connector pins from moisture or frost buildup
• Main control board failure misreading a working sensor
• Physical damage to the sensor from ice buildup or a shifted panel
• Power surge that temporarily disrupted the control board

How to fix the E1 error

1. Power cycle the freezer: Unplug the unit for 5 minutes, then plug it back in. This clears temporary faults and resets the control board.
2. Locate the sensor: Find the freezer temperature sensor, usually mounted near the evaporator coil behind the rear interior panel.
3. Check the wiring: Inspect the sensor’s wire harness for loose connections, frayed wires, or corrosion. Reseat any loose plugs firmly.
4. Test the sensor with a multimeter: Disconnect the sensor and check resistance against the manufacturer’s chart for the corresponding freezer temperature. A reading far outside range means the sensor has failed.
5. Replace the sensor if faulty: If the resistance test fails, order a replacement sensor matching your model number and swap it in.
6. Call a technician if the error persists: If wiring and sensor both test fine, the main control board is likely the cause and needs professional replacement.

FAQ

Can I still use my freezer with an E1 error showing?
It may keep running for a short time, but cooling performance often becomes unreliable. Address the fault promptly to avoid food spoilage.

Will unplugging the freezer fix the E1 code permanently?
A power cycle can clear the error if it was a temporary glitch, but if the sensor or wiring is actually faulty, the code will return.

How much does a replacement freezer sensor cost?
Parts typically run $15–$40, plus labor if you hire a technician, making this one of the cheaper Frigidaire repairs.