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Error code reference

GE Cooktop Error Code 105

Zero-cross failure.

GE codesGE cooktop codes

Zero-cross failure.

First step from the service manual

Recycle power to the cooktop. If fault persists, test the voltage supplied to cooktop at the wall outlet; voltage should read 175VAC-265VAC.

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

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What 105 means on a GE cooktop

Error code 105 on a GE cooktop indicates a zero-cross failure. The zero-cross signal is a reference point generated from the AC power supply that the cooktop's control board uses to synchronize the firing of power switching components, typically triacs or relays, with the AC waveform. This synchronization is essential for precise power control to the surface elements. When the control board cannot detect the zero-cross signal, it loses the ability to regulate element power accurately and triggers code 105 to shut down operation safely.

The most common cause of this fault is a supply voltage problem at the wall outlet. The cooktop requires an AC supply voltage within the range of 175VAC to 265VAC to function correctly. Voltage that falls outside this range, whether too low due to a weak circuit or too high due to a utility irregularity, can prevent the control board from detecting the zero-cross transition. A loose or corroded connection at the outlet, junction box, or cooktop terminal block can also cause voltage instability that mimics a zero-cross failure.

If the supply voltage tests within the acceptable range and the fault persists after a power cycle, the issue may lie with the control board itself. The zero-cross detection circuit is typically integrated into the main control board, and a failed component on that board can cause a permanent 105 fault regardless of supply conditions. At that point, replacing the control board is the likely repair path.

Source: manufacturer service documentation.

Common causes of 105

  1. 01

    Supply voltage out of range

    Wiring / connection

    If the voltage at the wall outlet falls below 175VAC or exceeds 265VAC, the cooktop cannot detect the zero-cross signal. Test the outlet voltage with a multimeter while the cooktop is connected to confirm it falls within the required range.

  2. 02

    Loose or corroded wiring connections

    Wiring / connection

    A loose connection at the wall outlet, junction box, or the cooktop's terminal block can cause intermittent or low voltage that disrupts zero-cross detection. Inspect all connections for tightness, corrosion, or heat damage.

  3. 03

    Tripped or weak circuit breaker

    Wiring / connection

    A partially tripped double-pole breaker can supply voltage on only one leg of the 240VAC circuit, resulting in abnormal voltage readings at the outlet. Reset the breaker fully and retest the outlet voltage.

  4. 04

    Failed main control board

    Part replacement

    If supply voltage is confirmed within spec and the fault persists after power cycling, the zero-cross detection circuit on the main control board may have failed. This internal board fault cannot be repaired and requires board replacement.

  5. 05

    Transient power event or surge

    Wiring / connection

    A voltage spike or momentary power interruption can trigger a one-time zero-cross fault. Recycling power to the cooktop is the first recommended step, as this type of fault often clears after a reset.

See the test procedure for each cause

Frequently asked questions about 105

What does 105 mean on a GE cooktop?
Error code 105 on a GE cooktop indicates a zero-cross failure. The cooktop's control board uses a zero-cross signal from the AC power supply to synchronize power delivery to the surface elements. When this signal is not detected, the cooktop shuts down and displays code 105. The fault points to either a supply voltage problem or, less commonly, a failed control board.
Will resetting my GE cooktop clear the 105 error?
Recycling power is the recommended first step for a 105 fault. Turn the cooktop off at the breaker or unplug it, wait a minute, then restore power. If the error was caused by a temporary power fluctuation or surge, the reset will often clear it. If the code returns immediately after power is restored, further diagnosis of the supply voltage or control board is needed.
How do I fix error code 105 on a GE cooktop?
Start by cycling power to the cooktop. If the fault returns, use a multimeter to measure the voltage at the wall outlet supplying the cooktop. The voltage must read between 175VAC and 265VAC. If voltage is out of range, the issue lies with your home's wiring or circuit breaker. If voltage is correct and the error persists, the main control board is the likely failed component and will need to be replaced.
Is error code 105 on a GE cooktop a safety concern?
Yes, the 105 fault is a safety-related shutdown. Without a valid zero-cross signal, the cooktop cannot regulate power to the heating elements properly, so the control board disables operation to prevent uncontrolled heating. Do not attempt to bypass or ignore this error. Resolve the underlying cause before using the cooktop.
How much does it cost to repair a GE cooktop showing error code 105?
If the fix is simply resetting the cooktop or tightening a loose wiring connection, there may be little to no cost involved. If the circuit breaker or outlet wiring needs professional attention, expect electrical service costs in the range of $75 to $200 or more depending on the work required. A replacement main control board, if that is the failed component, typically costs between $150 and $350 for the part, with additional labor costs if a technician performs the repair.

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