GE Refrigerator Error Code F6

F6 indicates that the fresh food evaporator thermistor is reading as invalid, either open or shorted. The control board cannot get a usable temperature signal from that sensor. As a result, the refrigerator defaults to fixed 20-minute fresh food defrost cycles and sets an abnormal defrost flag until the problem is resolved.

The refrigerator will continue to operate with F6 active, but defrost cycles in the fresh food section will run on a fixed 20-minute timer rather than adapting to actual conditions. Over time, this can lead to frost accumulation on the evaporator and reduced cooling performance. Food safety is not immediately at risk, but the issue should be repaired in a timely manner to prevent further complications.

If only the thermistor needs replacement, parts typically cost in the range of $15 to $50 depending on the specific model, making it one of the more affordable refrigerator repairs. If a technician is needed for diagnosis and installation, labor charges will add to that cost, generally bringing the total into the range of $100 to $250. Control board replacement, if required, is significantly more expensive and can range from $200 to $400 or more including labor.

A knowledgeable DIYer can often diagnose and fix F6 by testing the thermistor resistance with a multimeter and checking the wiring harness for damage or loose connections. If the thermistor reads open or shorted, replacing it is a straightforward repair that typically involves disconnecting a plug connector and removing a mounting clip. If the wiring and thermistor both test good, a control board issue is more likely and may require a technician.

Resetting the refrigerator by unplugging it or cycling the power may temporarily clear the code, but it will return if the thermistor or wiring fault is still present. The control board will detect the invalid sensor reading again on the next diagnostic cycle. A permanent fix requires repairing or replacing the faulty thermistor or correcting the wiring issue.