Thermador Cooktop Error Code E0342

E0342 indicates that the right ADB (relay board) has detected an error in its analog-to-digital current converter, which is responsible for measuring current through the induction coil inductors on the right side of the cooktop. When this measurement fails, the cooktop disables the affected zones to protect the appliance. The fault is localized to the right relay board and its associated measurement circuitry.

The cooktop will disable the right-side induction zones when E0342 is active, which prevents those zones from operating. You should not attempt to bypass this fault or continue using the affected zones. Left-side zones may still function depending on the cooktop configuration, but the appliance should be serviced before relying on it for regular cooking.

Repair costs for E0342 typically include the price of a replacement right ADB relay board plus labor. Parts alone for Thermador induction relay boards generally range from $150 to $400 depending on the specific model, with professional labor adding another $100 to $250. Total repair costs commonly fall in the range of $250 to $650, though this varies by region and service provider.

Resolving E0342 typically requires replacing the right ADB relay board, which involves working inside the cooktop with high-voltage components. This repair is best performed by a qualified appliance technician. Knowledgeable DIYers comfortable with appliance electronics can inspect wiring harness connections first, but the board replacement itself carries significant electrical risk if proper precautions are not taken.

A power reset by turning off the circuit breaker for 30 to 60 seconds may temporarily clear the error display, but E0342 will almost certainly return if the underlying board fault is not repaired. The A/D converter failure on the ADB is a hardware issue that does not resolve itself through resets. Clearing the code without repairing the board is not a long-term solution.