Thermador Cooktop Error Code E2331

E2331 indicates a fault in the inductor temperature sensor (NTC) on the right ADB (Analog Drive Board) of your Thermador induction cooktop. Specifically, the board is detecting that the NTC thermistor is not connected, meaning it is reading an open circuit on that sensor input. The cooktop will typically disable the affected induction zone until the fault is resolved. The issue is most often traced to a loose or misconnected wiring harness.

You should not continue using the affected induction zone while this error is present. The NTC thermistor is a safety-critical component that monitors the inductor temperature to prevent overheating. Without a functioning sensor reading, the cooktop cannot protect the induction coil from thermal damage, which could lead to component failure or a safety hazard.

Repair costs depend on the root cause. If the fix is simply reseating a loose connector, the cost is primarily a service call fee, typically in the range of $75 to $150. If the NTC thermistor needs replacement, parts and labor combined usually fall in the $100 to $250 range. Replacement of the right ADB is the most expensive scenario, with parts and labor potentially ranging from $300 to $600 or more depending on the specific model.

Checking and reseating the NTC wiring connector is a task a knowledgeable DIYer can attempt, but it does require safely accessing the interior of the cooktop. You should disconnect power before opening the unit and carefully inspect the harness connecting the NTC sensor to the right ADB. If the wiring is intact and correctly connected, further diagnosis involving resistance testing or board replacement is best handled by a qualified technician.

Resetting the cooktop by cutting power for a few minutes may temporarily clear the displayed code, but it will not resolve the underlying fault. If the NTC sensor remains disconnected or the wiring is faulty, the E2331 code will return as soon as the cooktop runs its self-diagnostic checks. A reset is only useful for ruling out a transient electrical glitch, not a persistent sensor connection problem.