Frigidaire Freezer Error Code E9

E9 indicates that the temperature thermistor circuit is open, meaning the control board cannot detect a valid signal from the temperature sensor. On Precision Set Control models, the display alternates between 'E9' and '-10°F'. The thermistor is responsible for sending temperature readings to the control board so it can regulate the compressor. This code requires inspection of the thermistor and its wiring circuit to restore normal operation.

Operating the freezer with an E9 error is not recommended for extended periods. Without a functioning thermistor, the control board cannot accurately regulate temperature, which means food safety cannot be guaranteed. You should check and move temperature-sensitive food to another unit until the sensor issue is resolved.

A power reset may temporarily clear the E9 display, but the code will return as soon as the control board again detects an open thermistor circuit. Resetting does not repair the underlying problem. A permanent fix requires replacing the faulty thermistor, repairing any damaged wiring, or addressing a failed connector.

A knowledgeable DIYer can often diagnose and fix this error. Start by locating the thermistor, disconnecting it, and testing its resistance with a multimeter. If the reading is infinite or OL, the thermistor needs to be replaced. If resistance appears normal, trace the wiring harness for loose connectors or damaged wires before concluding the control board is at fault.

If only the thermistor needs replacement, parts typically cost between $15 and $50 depending on the model, making it a relatively affordable repair. If a professional technician is needed, total repair costs including labor generally range from $100 to $250. A control board replacement, if required, would increase the cost significantly, typically ranging from $150 to $400 or more with labor.