Thermador Range Error Code 23

Error code 23 on a Thermador range is communicated through a two-part LED blink sequence: the first LED blinks twice, followed by the second LED blinking three times. This blink pattern is how the range's control system encodes fault information when a standard digital display is not available or active. The 2-3 blink sequence points to a fault condition registered by the main control board, though the specific subsystem involved is not broken down further in the available fault chart beyond the blink pattern itself.

Because the exact subsystem is not isolated in the documentation, diagnosis should focus on the components most commonly associated with coded faults in Thermador ranges: the main electronic control board, wiring harness connections, and any sensors or igniters tied into the control circuit. Intermittent or loose connections at the control board are a frequent root cause of unresolved or repeated fault codes in this range family. Technicians should visually inspect all harness connectors at the board for corrosion, heat damage, or pins that have backed out of their housings.

If the wiring and connections check out, the control board itself becomes the primary suspect. Control boards can develop internal faults that trigger blink codes without a clear external cause. Power cycling the unit by disconnecting it from the power supply for several minutes may temporarily clear the code, but if it returns after normal operation resumes, component-level diagnosis or board replacement is typically required to resolve the fault permanently.