Thermador Oven Error Code E6

E6 on a Thermador oven indicates a control board problem specific to models equipped with the earlier Dreefs control system. The error appears in the COOK MODE window and makes the oven completely inoperable. This is an internal board fault, not an external sensor or wiring issue. The only resolution is replacement of the control board.

No. The E6 error will not clear with a power cycle or reset because the fault is internal to the control board itself. Once this code appears, the oven remains locked and unusable regardless of how many times power is cycled. The board must be replaced to restore function.

The total repair cost depends on the price of the replacement Dreefs control board and the labor rate of the technician performing the work. Control board replacements on premium appliances like Thermador ovens typically range from a few hundred dollars to over a thousand dollars in total, including parts and labor. Getting a quote from a technician before proceeding is recommended, as board pricing can vary significantly depending on availability.

Control board replacement is technically possible as a DIY repair for someone comfortable working with appliance electronics, but it requires correctly identifying the Dreefs-style control board and sourcing a compatible replacement. Improper handling of the board or wiring connections can cause additional damage. Most homeowners will find it more reliable to have a qualified appliance technician perform this repair.

The oven is not usable when E6 is displayed. The control board failure locks the unit in an inoperable state, so no cooking functions can be activated. There is no risk of the oven accidentally heating, but the appliance should not be relied upon until the control board has been replaced and operation has been fully verified.