GE Refrigerator Error Code F511

F511 means the door control board has detected an invalid temperature reading from the icemaker mold thermistor. The thermistor is a resistance-based sensor that monitors how cold the ice-making tray is. When the board receives a signal outside its acceptable range, it logs F511 and the icemaker stops operating normally. The problem is most often a failed thermistor or a wiring issue.

A power reset may temporarily clear the F511 code, but if the underlying fault with the thermistor or wiring is still present, the code will return. Resetting is useful for ruling out a one-time electronic glitch, but a persistent F511 requires diagnosing and repairing the root cause before the error will stay cleared.

If only the mold thermistor needs replacement, parts typically cost in the range of $15 to $50, and labor from a technician may add $75 to $150. If the door board is the faulty component, board prices generally range from $80 to $200 or more depending on the model, with similar labor costs on top. Getting a diagnosis before ordering parts is the best way to control the total cost.

Some causes of F511 are DIY-friendly, such as reseating a loose connector, defrosting the icemaker compartment, or inspecting the wiring harness for visible damage. Replacing the mold thermistor is also a straightforward repair for someone comfortable with basic appliance work. Replacing the door board is more involved and may be better suited for a qualified technician.

The refrigerator's cooling system will generally continue to run while F511 is active, so food stored in the main compartment should remain safe. However, the icemaker will not function properly until the fault is resolved. It is best to address the repair promptly to avoid any secondary issues with the icemaker assembly.