Thermador Oven Error Code E012

E012 on a Thermador oven indicates a defective temperature sensor in the user interface PCB assembly. This sensor monitors the operating temperature of the oven's touch control electronics, not the cooking cavity. The error means the control system has detected a fault with that sensor or the board it is integrated into. Diagnosis starts with inspecting the touch PCB for visible damage, loose connectors, or corrosion.

Power cycling the oven by disconnecting it from power for several minutes may temporarily clear the error display, but if the user interface PCB sensor is genuinely defective, the code will return once the oven powers back on. A reset does not repair the underlying hardware fault. Clearing the error permanently requires repairing or replacing the faulty user interface assembly.

Repair costs vary depending on whether only a wiring harness connection needs to be corrected or the full user interface PCB assembly requires replacement. A professional diagnostic service call typically runs in the range of $80 to $150. If the touch PCB board needs replacement, parts and labor combined can range from $300 to $600 or more, depending on the specific Thermador model and local labor rates.

Some basic checks, such as reseating the wiring harness connectors at the user interface assembly, can be performed by a capable DIYer after disconnecting power to the oven. However, if the fault is within the touch PCB itself, the board typically needs to be replaced as a complete unit, which involves disassembling the control panel. If you are not comfortable working with oven electronics, a qualified appliance technician is recommended.

E012 indicates a fault in the control panel electronics, and operating the oven with an active board fault is not recommended. The user interface PCB manages input and safety functions, and a compromised board could behave unpredictably. It is best to stop using the oven and have it inspected before continuing to cook with it.