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Error code reference

GE Oven Error Code FC

Look for welded relay contacts (heating elements on in off mode); look for open thermal switch in lock motor…

GE codesGE oven codes

Look for welded relay contacts (heating elements on in off mode); look for open thermal switch in lock motor circuit (switch is normally closed and will open if area overheats due to fan not operating); look for high resistance in the sensor circuit due to high contact resistance or intermittent solder joint; electrical noise interference in the sensor circuit.

First step from the service manual

Look for welded relay contacts. Look for open thermal switch in lock motor circuit. Look for cause - fan thermal switch not closing, fan stalled, etc. Look for high resistance in sensor circuit due to poor terminal crimp, deformed terminals, loose connection inside sensor tube, or intermittent solder joint. Check for electrical noise interference (ham radio, cordless phone, etc.).

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

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What FC means on a GE oven

The FC error code on a GE oven signals a fault condition most commonly associated with welded relay contacts, a thermal switch failure in the lock motor circuit, high resistance in the oven temperature sensor circuit, or electrical noise interference. When relay contacts weld together, heating elements remain energized even when the control commands them off, creating a potentially dangerous runaway heating condition. The control detects this discrepancy and triggers the FC code to alert the technician that the oven is not responding correctly to shutoff commands.

The thermal switch in the lock motor circuit is a normally closed switch that opens if the surrounding area overheats, typically due to a stalled or non-functioning cooling fan. If this switch opens when it should remain closed, the lock motor circuit is interrupted and the FC code can result. Technicians should inspect the cooling fan for stalling or obstruction and verify the thermal switch continuity when the oven is at a safe, cool temperature.

High resistance in the sensor circuit is another common trigger. This can stem from poor terminal crimps, deformed connector terminals, a loose connection inside the sensor probe tube, or an intermittent solder joint on the control board. Even a small increase in circuit resistance can cause the control to misread oven temperature and log the FC fault. Additionally, external electrical noise from sources such as ham radio transmitters or cordless phones can introduce signal interference into the sensor circuit and produce false FC codes.

Source: manufacturer service documentation.

Common causes of FC

  1. 01

    Welded Relay Contacts

    Part replacement

    Relay contacts can fuse together due to arcing or overheating, causing heating elements to stay on even when the control sends an off signal. Inspect the relay board for signs of burning, pitting, or contacts that do not open when power is removed.

  2. 02

    High Resistance in the Sensor Circuit

    Wiring / connection

    Poor terminal crimps, deformed connector terminals, a loose connection inside the sensor probe tube, or an intermittent solder joint can all raise circuit resistance and cause the control to misread oven temperature. Check all sensor wiring connections and measure resistance through the circuit to locate the fault.

  3. 03

    Open Thermal Switch in Lock Motor Circuit

    Part replacement

    The thermal switch in the lock motor circuit is normally closed and opens only if the area overheats, which typically happens when the cooling fan is not operating correctly. Test the switch for continuity and inspect the fan for stalling or obstruction.

  4. 04

    Cooling Fan Failure

    Part replacement

    A stalled or non-functioning cooling fan allows heat to build up around the lock motor circuit, which causes the thermal switch to open and can trigger the FC code. Spin the fan blade by hand to check for obstructions and verify the fan motor operates when called.

  5. 05

    Electrical Noise Interference

    Wiring / connection

    External sources of radio frequency interference such as ham radio equipment or certain cordless phones can introduce noise into the oven sensor circuit and produce false FC faults. If the error appears intermittently with no other identifiable cause, check for nearby wireless devices and try eliminating them as a variable.

See the test procedure for each cause

Frequently asked questions about FC

What does FC mean on a GE oven?
The FC code on a GE oven indicates a fault related to one of several conditions: welded relay contacts that keep heating elements energized during an off command, an open thermal switch in the lock motor circuit caused by overheating, high resistance in the temperature sensor circuit, or electrical noise interference in the sensor wiring. The control uses this code to flag that the oven is not behaving as expected during normal operation or a self-clean cycle.
Is it safe to use my GE oven when the FC code is displayed?
No, you should not use the oven until the FC code has been diagnosed and resolved. One possible cause is welded relay contacts, which can keep the heating elements on even when the oven is supposed to be off. This creates a potential overheating hazard and should be addressed before operating the appliance again.
Will resetting the oven clear the FC error code?
A reset by cutting power at the breaker for a few minutes may temporarily clear the FC code, but it will return if the underlying fault is still present. If the cause is welded relay contacts, a faulty thermal switch, or a damaged sensor connection, the code will reappear until the defective component is repaired or replaced. A reset is useful for ruling out a one-time electrical noise event, but it is not a fix.
How do I fix the FC error on a GE oven?
Start by inspecting the relay contacts on the control or relay board for signs of welding or burning. Next, check the thermal switch in the lock motor circuit for continuity and inspect the cooling fan for stalling or obstruction. Then examine the sensor circuit wiring for poor crimps, deformed terminals, loose connections at the probe, or intermittent solder joints on the board. Finally, consider whether nearby wireless devices could be causing electrical noise interference, especially if the fault appears only occasionally.
How much does it cost to repair a GE oven with an FC error code?
Repair costs vary depending on the root cause. Replacing a relay board typically runs between $150 and $350 including parts and labor. A thermal switch replacement is generally less expensive, often in the $80 to $180 range. If the fault is limited to a loose or corroded sensor connection that can be serviced without new parts, a diagnostic and repair visit may cost between $75 and $150. Costs can be higher if multiple components are involved or if the control board itself requires replacement.

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