Thermador Oven Error Code F23

F23 on a Thermador oven means the control board has detected a shorted-low condition on the lower oven cancel key. The control is reading a constant low signal from that key's circuit, as if the button is being pressed continuously. This prevents normal oven operation until the fault is corrected. The most common cause is a failed touchpad membrane or moisture contamination on the control panel.

You should not attempt to use the oven while F23 is active. The shorted cancel key signal disrupts normal control board communication, and the oven's cooking functions are typically locked out as a result. Continuing to operate the appliance in this state could cause unexpected behavior and should be avoided until the fault is diagnosed and repaired.

Repair costs vary depending on the failed component. A replacement touchpad membrane or control panel assembly typically runs in the range of $80 to $250 or more for the part alone, depending on the specific model. If a new electronic control board is also required, total parts and labor costs could range from $200 to $500 or higher. Getting a diagnosis from a qualified technician before ordering parts is recommended.

If the cause is moisture or debris on the control panel, carefully cleaning the surface and allowing it to dry completely may resolve the error. However, if the touchpad membrane or ribbon cable is damaged, those components will need to be replaced, which requires disassembling the control panel. Board-level repairs should be handled by a qualified technician.

Disconnecting the oven from power for several minutes and then restoring power may temporarily clear the F23 code, but the error will almost certainly return if the underlying cause has not been corrected. A reset does not repair a shorted touchpad membrane, contaminated keypad, or damaged ribbon cable. Use a reset only as a temporary diagnostic step, not as a fix.