Thermador Cooktop Error Code E0347

E0347 means the right ADB induction module has been unable to correctly detect its position in the appliance. The ADB is the relay board that manages the right-side induction zones, and the cooktop's control system requires each module to confirm its location during operation. When that confirmation fails, the error is triggered and the affected zone is disabled. The most direct fix is replacement of the right relay board.

The cooktop disables the affected right-side induction zone when E0347 is present, so that zone will not operate. While the left-side zones may still function, continued use of the appliance in a fault state is not recommended. It is best to resolve the error before resuming regular cooking to ensure the appliance is operating as designed.

Repair costs depend on whether the fix requires only reseating a connector or a full relay board replacement. A service call and board replacement for an induction cooktop ADB typically falls in the range of $200 to $600 or more, depending on parts pricing and local labor rates. Getting a diagnostic quote from a Thermador-authorized service provider will give you the most accurate estimate for your specific unit.

A knowledgeable DIYer can start by checking that all wiring harness connectors to the right ADB are fully seated and undamaged, as a loose connection can sometimes trigger this code. However, if the connectors are intact and the error remains, the right relay board itself needs to be replaced, which involves working inside a high-voltage appliance. This repair is generally recommended for qualified technicians due to the risk of electric shock from residual capacitor charge in induction components.

A power reset, such as switching off the circuit breaker for 30 seconds and restoring power, may temporarily clear the error display. However, if the right ADB relay board has a genuine internal fault or a loose connection remains unresolved, the code will return during the next startup or operation cycle. A reset does not repair the underlying hardware issue.