GE Cooktop Error Code 104

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.

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.

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.

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.

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.