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Error code reference

GE Range Error Code F018

Oven relay board failure (wiggler).

GE codesGE range codes

Oven relay board failure (wiggler).

First step from the service manual

Replace the oven relay board.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What F018 means on a GE range

The F018 error code on a GE range indicates a failure within the oven relay board, which is sometimes referred to as the wiggler board. The relay board is a dedicated control board that governs the switching of high-voltage relays responsible for energizing the oven's bake and broil elements. When the main control detects that the relay board is not responding correctly or is producing unexpected output signals, it flags the F018 fault and may shut down oven functions as a safety precaution.

The term "wiggler" refers to the oscillating signal that the relay board sends back to the main control board to confirm it is functioning properly. If that feedback signal is absent, irregular, or out of specification, the control interprets this as a relay board failure and triggers the F018 code. This design is a built-in safety mechanism intended to prevent uncontrolled heating caused by a stuck or shorted relay.

Common causes of this fault include internal relay failure on the board itself, damaged traces or solder joints on the relay board, or wiring harness issues between the relay board and the main control. Because the first diagnostic step points directly to relay board replacement, the board itself is the most probable failed component rather than an upstream wiring or control issue. The relay board is a separate serviceable assembly and is the primary focus of any repair attempt for this code.

Source: manufacturer service documentation.

Common causes of F018

  1. 01

    Failed oven relay board

    Part replacement

    The relay board itself has an internal failure, such as a burned relay, damaged component, or broken feedback circuit. This is the most likely cause and the board should be replaced as the first repair step.

  2. 02

    Faulty wiring harness connection

    Wiring / connection

    Loose, corroded, or damaged connectors between the relay board and the main control board can interrupt the wiggler signal. Inspect all connectors at both ends of the harness for signs of heat damage or corrosion before ordering parts.

  3. 03

    Burned or damaged relay contacts

    Part replacement

    The high-current relays on the board can develop burned or welded contacts due to repeated switching under load. This can cause the board to send an incorrect feedback signal or no signal at all.

  4. 04

    Cold or cracked solder joints on the relay board

    Part replacement

    Thermal cycling over time can crack solder joints on the relay board, breaking continuity in the control or feedback circuit. Visual inspection under magnification may reveal dull or fractured joints.

  5. 05

    Main control board misreading the signal

    Part replacement

    In rare cases, the main control board may incorrectly interpret a valid wiggler signal and trigger a false F018 code. This is the least likely cause and should only be considered after confirming the relay board and wiring are in good condition.

See the test procedure for each cause

Frequently asked questions about F018

What does F018 mean on a GE range?
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.
Can I fix the F018 error on my GE range myself?
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.
Is it safe to use my GE range while F018 is displayed?
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.
Will resetting my GE range clear the F018 error code?
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.
How much does it cost to repair a GE range with an F018 error?
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.

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