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Error code reference

GE Cooktop Error Code 104

Main board MUX failure.

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Main board MUX 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 104 means on a GE cooktop

Error code 104 on a GE cooktop indicates a MUX (multiplexer) failure on the main control board. The multiplexer is an integrated circuit on the main board responsible for routing and switching multiple input signals from the inductive sensors across a single shared communication channel. In induction cooktops, these sensors detect the presence, size, and position of cookware on the surface, and the MUX coordinates how that sensor data is read and processed by the control system. When the MUX fails or produces inconsistent signals, the control board can no longer reliably interpret sensor input, triggering code 104.

The failure can stem from a firmware or communication glitch that causes the MUX to lose its signal-routing state, which is why power cycling is the first recommended diagnostic step. Cutting power allows the board to fully discharge and reinitialize all onboard circuits. If the fault clears after recycling power, the failure was likely a transient software or signal error rather than a hardware defect.

If the code returns after the power cycle, the main control board itself is considered faulty and must be replaced. Following replacement, inductive sensor recalibration is required to ensure the new board correctly maps sensor positions and cookware detection thresholds. Skipping recalibration after board replacement can result in persistent sensor errors or unreliable zone activation.

Source: manufacturer service documentation.

Common causes of 104

  1. 01

    Transient control board glitch

    Wiring / connection

    A temporary software or power fluctuation can cause the MUX circuit to lose its signal state. This is the most common cause and often resolves after a full power cycle.

  2. 02

    Failed multiplexer circuit on main board

    Part replacement

    The MUX integrated circuit on the main board can fail due to age, heat stress, or electrical surge. If the fault code returns immediately after power cycling, hardware failure of the board is the likely cause.

  3. 03

    Faulty inductive sensor connection

    Wiring / connection

    A loose or damaged wiring harness between the inductive sensors and the main board can produce erratic signals that the MUX cannot route correctly. Inspect connectors for corrosion, pinching, or loose seating.

  4. 04

    Damaged inductive sensor

    Part replacement

    A defective inductive sensor can send signals outside the expected range, overwhelming the MUX and causing it to report a failure. If board replacement does not resolve the fault, individual sensors should be evaluated.

  5. 05

    Incomplete sensor recalibration after prior repair

    Wiring / connection

    If the main board was previously replaced without completing the required inductive sensor recalibration, the MUX may operate with mismatched sensor parameters, producing fault code 104.

See the test procedure for each cause

Frequently asked questions about 104

What does 104 mean on a GE cooktop?
Error code 104 on a GE cooktop indicates a main board MUX (multiplexer) failure. The multiplexer is a circuit on the control board that manages communication between the inductive sensors and the board's processor. When this circuit fails or loses its signal state, the cooktop cannot reliably process sensor data and displays code 104. The first step is to recycle power, and if the code returns, the main board will need to be replaced and the sensors recalibrated.
Will resetting my GE cooktop clear the 104 error code?
A power reset is the first recommended diagnostic step and can clear code 104 if the fault was caused by a transient signal or software glitch. To reset, disconnect the cooktop from power completely and wait at least one minute before restoring power. If the code reappears after the reset, the underlying hardware fault on the main board has not been resolved and a board replacement is needed.
Is it safe to use my GE cooktop while it shows error code 104?
It is not recommended to continue using the cooktop while code 104 is active. A MUX failure means the board cannot reliably read the inductive sensors, which are responsible for detecting cookware presence and controlling heating zones. Operating the cooktop in this state could result in unpredictable behavior from the heating elements.
How do I fix error code 104 on a GE cooktop?
Start by recycling power to the cooktop: shut off the circuit breaker or unplug the unit, wait one minute, then restore power. If the code clears and does not return, no further action is needed. If the fault persists, the main control board must be replaced, followed by a recalibration of the inductive sensors. It is also worth inspecting the wiring harnesses between the sensors and the board for loose or damaged connectors before committing to a board replacement.
How much does it cost to fix a GE cooktop showing error code 104?
If the fault clears with a power reset, there is no parts cost involved. If the main board requires replacement, parts alone typically range from roughly $150 to $400 or more depending on the specific cooktop model. Adding professional labor for board replacement and sensor recalibration can bring the total repair cost to approximately $250 to $600 or higher, depending on your location and the technician's rates.

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