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Error code reference

GE Cooktop Error Code 108

Line monitor failure.

GE codesGE cooktop codes

Line monitor failure.

First step from the service manual

Recycle power to the cooktop. If fault persists, replace main board and recalibrate inductive sensors.

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

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What 108 means on a GE cooktop

Error code 108 on a GE cooktop indicates a line monitor failure. The line monitor circuit is a built-in protection function on the main control board that continuously tracks the incoming AC line voltage to ensure it remains within acceptable operating parameters. When this circuit detects an anomaly in the power supply signal, such as a drop, spike, or loss of reference voltage, it triggers code 108 and interrupts normal cooktop operation to prevent potential damage to the induction components.

The most common triggers for this fault are transient power events: brief outages, brownouts, or voltage irregularities from the home's electrical supply. These events can cause the line monitor circuit to latch into a fault state even after the power disturbance has passed. In some cases, a corrupted state in the main board's firmware or control logic can also produce a false line monitor fault without any actual problem in the incoming power.

If recycling power does not clear the fault, the main control board itself is the primary suspect. The line monitor function is integrated into the main board circuitry, so a failure of that circuit requires full board replacement. Following board replacement, inductive sensor recalibration is required to restore proper cooktop operation, as the new board must re-establish accurate baseline readings for the induction zones.

Source: manufacturer service documentation.

Common causes of 108

  1. 01

    Transient power event or voltage irregularity

    Wiring / connection

    A brief power outage, brownout, or voltage spike can cause the line monitor circuit to latch a fault state. This is the most frequent cause and is often resolved by recycling power at the breaker.

  2. 02

    Failed main control board

    Part replacement

    If the line monitor circuit on the main board has failed internally, the fault will persist regardless of power resets. Board replacement is required in this scenario.

  3. 03

    Corrupted control board firmware or logic state

    Wiring / connection

    The board's control logic can enter a corrupted fault state after an electrical event, producing a false line monitor error. A power cycle is the first step to clear this condition.

  4. 04

    Unstable or incorrect supply voltage at the cooktop

    Wiring / connection

    A wiring issue at the wall connection, a failing breaker, or an undersized circuit can cause ongoing voltage irregularities that repeatedly trigger the line monitor fault.

  5. 05

    Inductive sensor calibration loss following board fault

    Part replacement

    After a board replacement, uncalibrated inductive sensors can contribute to control errors. Recalibration is required as part of the repair process after installing a new main board.

See the test procedure for each cause

Frequently asked questions about 108

What does 108 mean on a GE cooktop?
Error code 108 on a GE cooktop indicates a line monitor failure. The line monitor is a circuit on the main control board that tracks incoming AC power for irregularities. When it detects a problem, the cooktop shuts down and displays code 108 to protect internal components. The fault may be caused by a power disturbance or by a failed main control board.
Will resetting the power clear error code 108 on my GE cooktop?
A power reset is always the correct first step for code 108 and will clear the fault if it was triggered by a transient voltage event. Turn the cooktop off at the circuit breaker for at least one minute, then restore power. If the code returns after the reset, the main control board has likely failed and will need to be replaced.
Is it safe to use my GE cooktop while it shows error code 108?
No, you should not attempt to operate the cooktop while code 108 is active. The cooktop disables itself when this fault is detected specifically to prevent unsafe operation under abnormal power conditions. Resolve the fault before resuming use.
How much does it cost to fix error code 108 on a GE cooktop?
If the fault clears with a power reset, there is no repair cost involved. If the main control board needs replacement, parts and labor typically range from $200 to $500 or more depending on the specific model and local service rates. Inductive sensor recalibration is also required after a board replacement, which may be included in a technician's service fee.
What parts are needed to fix error code 108 if resetting does not work?
If recycling power does not clear the fault, the main control board is the required replacement part. After installing the new board, the inductive sensors must also be recalibrated to restore full cooktop functionality. No other components are specified for this repair.

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