Thermador Oven Error Code E101

E101 means the control board has detected an open circuit in the temperature sensor for the upper or single oven cavity (Cvt 1). The sensor is an RTD-type probe that the board uses to monitor cavity temperature, and an open reading means no electrical continuity exists through that circuit. The oven will not operate normally until the fault is resolved. Diagnosis begins with consulting the sensor wiring diagram (Diagram 2/4) and resistance-testing the sensor and harness.

No, you should not attempt to use the oven while E101 is active. The error indicates the control system cannot read cavity temperature, which means it cannot regulate heat properly. Operating the oven in this condition risks uncontrolled heating. Discontinue use until the sensor circuit has been inspected and repaired.

Repair costs depend on which component in the sensor circuit has failed. A replacement temperature sensor probe typically costs in the range of $30 to $80 for the part alone, while a new control board can range from $150 to $400 or more. Adding labor for a professional technician generally brings total repair costs to somewhere between $100 and $500 or higher, depending on the failed component and local service rates.

Some steps, such as reseating loose connectors or visually inspecting wiring for obvious damage, can be performed by a confident DIYer after disconnecting power to the appliance. However, resistance-testing the sensor and harness requires a multimeter and basic knowledge of how to access oven components safely. Replacing the control board is generally best left to a qualified technician. If you are uncertain about working inside the oven's electrical system, professional service is recommended.

A reset, such as cycling the circuit breaker or powering the oven off and back on, may temporarily clear the code from the display. However, if the underlying open circuit condition still exists in the sensor or wiring, E101 will return as soon as the control board runs its diagnostic checks. A reset is not a repair, and the root cause must be addressed to permanently resolve the fault.