Thermador Oven Error Code E3

E3 on a Thermador oven with an earlier Dreefs control board means the oven temperature sensor is not functioning correctly. The control board cannot read a valid signal from the sensor, so it disables oven operation entirely. The oven will not heat until the sensor or its wiring is repaired or replaced.

No. When E3 is active, the oven has disabled itself and will not heat. This is a built-in safety lockout to prevent uncontrolled or unmonitored heating. You should not attempt to bypass the error and use the oven until the temperature sensor issue has been properly diagnosed and repaired.

The cost depends on whether the sensor alone needs replacement or if the wiring harness or control board is also involved. A replacement oven temperature sensor for a Thermador typically costs between $30 and $100 for the part. Adding professional labor, total repair costs generally range from $100 to $300, with control board replacement pushing costs toward the higher end of that range or beyond.

A knowledgeable DIYer can test the oven temperature sensor using a multimeter to check resistance at the sensor terminals. If the reading is far outside the expected range of approximately 1080 to 1100 ohms at room temperature, the sensor can be replaced as it is typically secured with one or two screws inside the oven cavity. However, if the wiring harness or control board is involved, a qualified technician should handle the repair.

A power reset by turning off the circuit breaker for one to two minutes may temporarily clear the display, but the E3 error will return as soon as the control board attempts to read the temperature sensor again. Clearing the code does not fix the underlying fault. The sensor or wiring must be tested and repaired for the error to stay resolved.