GE Range Error Code F018

F018 indicates a failure of the oven relay board, also called the wiggler board. This board controls power delivery to the oven heating elements and sends a feedback signal to the main control to confirm it is operating correctly. When that signal is missing or abnormal, the control triggers the F018 fault code. The oven may stop heating entirely until the issue is resolved.

It is not recommended to continue using the oven while this error is active. The F018 code indicates the safety feedback system for the relay board has failed, which means the control cannot confirm that the heating relays are operating correctly. Using the oven in this state could result in uncontrolled heating or no heating at all. The stovetop surface burners may still function, but the oven should be taken out of service until the relay board is replaced.

If you replace the oven relay board yourself, parts typically cost in the range of $75 to $200 depending on the model. If you hire a technician, you can expect to pay between $150 and $350 or more when factoring in the part cost and labor. Getting a quote from a local appliance repair service before committing to the repair is a good idea, especially on older ranges where the repair cost may approach the value of the appliance.

Replacing the oven relay board is within the skill range of a confident DIYer who is comfortable working with appliance electronics and disconnecting power before servicing. You will need to identify the correct relay board part number for your specific model and carefully reconnect the wiring harness. If you are not comfortable working around high-voltage components, a qualified appliance technician should perform the repair.

Disconnecting power to the range for a few minutes and restoring it may temporarily clear the F018 code, but the fault will almost certainly return if the relay board has a genuine hardware failure. A power reset does not repair a failed component. The code should be treated as a persistent fault requiring relay board replacement rather than a one-time glitch.