Thermador Oven Error Code E5

E5 on a Thermador oven indicates a control board problem that is detected when the selector knob is in the OFF or CLEAN positions. The oven will still operate in standard COOK modes, but the self-clean cycle is disabled while the error is active. The fault points to an issue with how the control board reads the selector position for those two specific modes.

Yes, according to the error definition, the oven remains usable in all standard COOK modes when E5 is displayed. The error specifically disables the self-clean cycle but does not affect normal cooking operation. You should still address the fault before attempting to run a clean cycle.

Repair costs depend on which component is at fault. A selector switch replacement is generally a lower-cost repair, while replacing the control board tends to be more expensive, often ranging from a few hundred dollars up to several hundred dollars including parts and labor. Getting a diagnosis from a qualified technician before ordering parts is recommended to avoid unnecessary expenses.

Start by turning the selector knob to OFF and then nudging it very slightly counterclockwise to ensure it is fully seated on the detent. If the error persists, the next steps are to inspect the selector switch for proper continuity in all positions and to check the wiring connections between the switch and the control board. If neither of those resolves the problem, the control board itself likely needs to be replaced.

Simply resetting the oven by cutting power is unlikely to permanently clear E5 if an underlying hardware fault is present, such as a worn selector switch or a failing control board. The initial knob adjustment described in the diagnostic steps may resolve it if the knob was not fully seated, but a reset alone will not correct a mechanical or electronic component problem. The error will typically return once the oven is powered back on if the root cause has not been addressed.