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Error code reference

GE Cooktop Error Code FA5

Bad coil thermistor reading.

GE codesGE cooktop codes

Bad coil thermistor reading.

First step from the service manual

Check coil thermistor and induction Tray. Replace coil.

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
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What FA5 means on a GE cooktop

The FA5 error code on a GE induction cooktop indicates that the control board has detected a bad or out-of-range reading from the coil thermistor. The coil thermistor is a temperature-sensing component embedded in or positioned near the induction coil assembly. It monitors heat levels during operation to protect the coil and surrounding components from thermal damage. When the control board receives a signal from this thermistor that falls outside expected parameters, whether too high, too low, or erratic, it triggers FA5 and halts operation to prevent damage.

The induction tray, which houses the coil assembly and thermistor, is closely involved in this fault. Physical damage to the tray, loose wiring connections, or a failed thermistor can all produce the bad reading the control board is detecting. The thermistor itself may have drifted out of its specified resistance range due to heat cycling, physical damage, or age. Wiring harness issues between the thermistor and control board, such as pinched, corroded, or disconnected leads, can also produce false readings that trigger FA5.

The primary diagnostic path involves inspecting the coil thermistor and induction tray assembly for visible damage, then checking thermistor resistance against rated specifications. If the thermistor or coil assembly is found to be faulty, replacement of the coil unit is the recommended corrective action. Because the thermistor is typically integrated into the coil assembly rather than sold as a standalone part, repair usually means replacing the full coil.

Source: manufacturer service documentation.

Common causes of FA5

  1. 01

    Failed coil thermistor

    Part replacement

    The thermistor inside the induction coil assembly has failed or drifted out of its acceptable resistance range, causing the control board to read an invalid signal. This is the most common root cause of FA5 and typically requires coil replacement.

  2. 02

    Damaged or loose thermistor wiring

    Wiring / connection

    Wiring connecting the coil thermistor to the control board may be pinched, corroded, or disconnected, producing an open or short circuit that mimics a bad thermistor reading. Inspect the harness and connectors for visible damage or looseness.

  3. 03

    Damaged induction tray

    Part replacement

    Physical damage to the induction tray that houses the coil and thermistor can displace the thermistor from its correct position or damage its leads. Inspect the tray carefully for cracks, burn marks, or impact damage.

  4. 04

    Overheated coil assembly

    Part replacement

    Prolonged high-heat operation or blocked ventilation can cause the coil assembly to overheat, potentially damaging the thermistor permanently. Check that the cooktop's ventilation paths are clear before and after replacement.

  5. 05

    Control board fault

    Part replacement

    In less common cases, the control board itself may be misreading a signal from an otherwise functional thermistor. This is typically considered only after the coil assembly and wiring have been inspected and confirmed good.

See the test procedure for each cause

Frequently asked questions about FA5

What does FA5 mean on a GE cooktop?
FA5 on a GE induction cooktop means the control board has detected a bad reading from the coil thermistor, which is the temperature sensor built into the induction coil assembly. The cooktop shuts down to prevent potential damage from unmonitored heat. Diagnosis involves inspecting the thermistor, induction tray, and associated wiring, with coil replacement being the typical repair.
Can I fix FA5 on my GE cooktop myself?
A knowledgeable DIYer can inspect the wiring harness and connectors leading to the coil thermistor for obvious damage or loose connections. However, if the coil assembly itself needs to be replaced, this involves working inside the cooktop with high-voltage components and requires comfort with appliance disassembly. If you are not experienced with appliance repair, a qualified technician is the safer choice.
Is it safe to use my GE cooktop while FA5 is displayed?
No, you should not attempt to continue using the cooktop while FA5 is active. The error means the cooktop can no longer reliably monitor coil temperature, which removes a key safety protection against overheating. Keep the unit powered off until the fault is diagnosed and repaired.
How much does it cost to repair a GE cooktop FA5 error?
Repair costs depend on the specific cause. If only a wiring connection needs to be reseated, costs may be limited to a service call fee, typically in the range of $75 to $150. If the induction coil assembly requires replacement, parts alone can range from $100 to $300 or more depending on the model, plus labor if a technician is performing the repair.
Will resetting my GE cooktop clear the FA5 error code?
Resetting the cooktop by cutting power at the breaker may temporarily clear the FA5 code, but the error will return if the underlying problem with the coil thermistor or induction tray has not been resolved. A reset is useful for confirming whether the fault is intermittent, but it is not a fix for the root cause.

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