Frigidaire Refrigerator Error Code Er FS

Er FS indicates a freezer sensor error caused by a short circuit or disconnection in the freezer temperature sensor circuit. The control board is not receiving a valid resistance signal from the sensor, which prevents accurate freezer temperature monitoring. The issue can originate at the sensor itself, the wiring, or a connector along the harness.

A power reset, such as unplugging the unit for a few minutes, may temporarily clear the code, but it will return if the underlying sensor fault has not been corrected. The code is triggered by a hardware fault in the sensor circuit, so a reset alone does not resolve the problem. Proper diagnosis and repair of the sensor, wiring, or connector is required for a lasting fix.

If the fix is simply reseating a loose connector, there may be no parts cost, just the cost of a service call if you use a technician. Replacing the freezer thermistor sensor typically costs between $20 and $60 for the part, with labor adding $80 to $150 depending on your area. If the main control board is at fault, part costs can range from $100 to $300 or more.

Start by checking each sensor wire connector for loose or disconnected fittings and reseat them firmly. If the connections are secure, use a multimeter to test the resistance of the freezer thermistor and replace the sensor if it reads open or shorted. Also inspect the wiring harness for any visible breaks or damage along its full length.

Operating the refrigerator with an active Er FS code means the control board cannot accurately monitor freezer temperature, which may cause the freezer to run warmer or colder than intended. Food safety can be compromised if the freezer temperature rises above safe levels. It is best to address the fault promptly and verify proper freezer temperatures with a separate thermometer in the meantime.