Thermador Oven Error Code E215

E215 means the lower oven cavity (Cavity 2) has been detected at a temperature that is too high while operating in its normal, unlocked state. The oven's control system monitors the lower cavity temperature sensor continuously, and this code triggers when that reading exceeds the acceptable threshold. It can result from a bad temperature sensor, faulty wiring, a stuck heating element relay, or an actual overheating condition.

A reset by cutting power to the oven at the breaker for several minutes may temporarily clear the E215 code, but if the underlying cause is not repaired, the fault will return. If the error reappears after a reset, the temperature sensor, wiring harness, or control board needs to be diagnosed and repaired before the oven can operate reliably.

Repair costs vary depending on which component has failed. A lower cavity temperature sensor typically costs between $20 and $80 for the part, while a control board replacement can range from $150 to $400 or more for the part alone. Adding professional labor, total repair costs commonly fall between $150 and $600 depending on the diagnosis and the specific parts required.

You should not continue using the oven while E215 is active. The code indicates either a genuine overtemperature condition or a sensor fault, both of which warrant inspection before further use. Continuing to operate the oven risks damage to internal components or, if the lower cavity is genuinely overheating, a potential safety hazard.

Start by checking the lower cavity temperature sensor for correct resistance values and inspect the wiring harness for damage, shorts, or loose connections. If the sensor and wiring check out, the control board's relay circuits should be inspected for a stuck relay that may be keeping the heating element on. Depending on the faulty component, the repair will involve replacing the temperature sensor, repairing the wiring, or replacing the control board.