Thermador Oven Error Code E215

Error code E215 on a Thermador oven indicates that the lower cavity, designated as Cavity 2 (Cvt 2), has detected a temperature that is excessively high while the cavity is in an unlocked state. This is a thermal protection fault generated when the oven's control system reads a temperature from the lower cavity's temperature sensor that exceeds the acceptable operating threshold for normal, non-locked operation. The distinction between locked and unlocked cavity states is significant in double-oven configurations, where a cavity lock typically corresponds to a self-clean cycle running at extreme temperatures.

The primary components involved in triggering E215 are the lower cavity temperature sensor (often an RTD or NTC thermistor), the associated wiring harness, and the main control board that processes the sensor signal. A faulty temperature sensor can report artificially elevated readings even when actual cavity temperatures are within normal range, causing the control board to trigger this fault incorrectly. Conversely, a genuine overtemperature condition in the lower cavity can also cause this code if heat is not dissipating properly.

Common root causes include a failed or drifting lower cavity temperature sensor, a short or open circuit in the sensor wiring, a malfunctioning control board that misinterprets sensor data, or actual overheating caused by a stuck relay on the control board that keeps the lower cavity bake or broil element energized beyond the intended setpoint. Proper diagnosis requires checking sensor resistance values against specifications and inspecting wiring continuity before replacing components.