Thermador Cooktop Error Code E3

E3 on a Thermador cooktop indicates a temperature sensor open circuit detected during an active cooking cycle. The control board receives no usable resistance signal from the oven temperature sensor for 60 consecutive seconds and then shuts the affected oven off. The sensor should read approximately 1050 ohms at room temperature when functioning correctly.

The cooktop shuts off the affected oven automatically when E3 is triggered, which is the appliance's built-in safety response to a sensor failure. You should not attempt to bypass or ignore this shutdown. Continued use without a functioning temperature sensor could result in uncontrolled heating conditions, so the fault should be diagnosed and resolved before returning the unit to service.

Repair costs vary depending on the root cause. A replacement temperature sensor typically runs in the range of $30 to $80 for the part alone, while a new control board can cost $150 to $400 or more. Adding professional labor charges, total repair costs generally range from $100 to $500 depending on the failed component and your location.

Some basic checks, such as reseating the sensor connector or visually inspecting the wiring harness, can be done by a careful DIYer comfortable working with appliance electronics. However, accurately testing sensor resistance with a multimeter and tracing a wiring fault through the harness requires some technical skill. Replacing the control board is best left to a qualified technician.

A power reset may temporarily clear the E3 code, but if the underlying sensor or wiring fault still exists, the code will return once the unit is used again and the 60-second debounce period elapses. A reset does not fix the root cause, so the sensor circuit should be fully diagnosed rather than relying on repeated resets.