GE Refrigerator Error Code F79

F79 means the refrigerator control board is not receiving a signal from the hot water temperature and pressure (T&P) switch. This indicates the switch input is missing, which can be caused by a failed switch, a disconnected wiring connector, or damaged wiring. The error is a safety-related fault and requires inspection of the switch and its wiring circuit.

Because F79 involves a safety sensing component in the hot water circuit, continued use without diagnosing the fault is not recommended. The T&P switch is designed to monitor conditions that could indicate a developing problem. Running the appliance with this sensor circuit open means that safety monitoring function is not operating as intended.

Resetting the refrigerator may temporarily clear the F79 code, but it will return if the underlying problem with the T&P switch or its wiring is not corrected. A reset does not repair a failed switch, broken wire, or loose connector. Always diagnose and resolve the root cause before relying on a reset to clear the fault.

A knowledgeable DIYer can start by checking that all wiring connectors near the T&P switch are fully seated and free of corrosion. If the connectors look good, testing the switch with a multimeter for continuity is the next step. However, if the switch needs replacement or the control board is suspected, a qualified technician is recommended for those repairs.

If the fix is simply reseating a loose connector, there may be little to no parts cost, with a service call fee typically ranging from $75 to $150. If the T&P switch needs replacement, parts and labor combined generally range from $100 to $250 depending on your location and the specific model. Control board replacement, if required, can bring the total cost to $200 to $400 or more.