Thermador Range Error Code E15

E15 on a Thermador range indicates a control board problem specifically within the Dreefs control module. This board manages core oven and cooking functions, and when an internal fault is detected, the range displays E15 to signal that the control board has failed. The recommended repair is replacement of the Dreefs board.

A reset by cutting power at the breaker may temporarily clear the display, but E15 indicates an internal failure of the Dreefs control board. Because the fault is hardware-based rather than a software glitch, the error will typically return once power is restored and the board attempts to operate. A reset alone will not fix the underlying problem.

Repair costs depend on parts and labor rates in your area. The Dreefs control board itself typically ranges from roughly $150 to $400 or more depending on the specific model. If a professional technician performs the repair, total costs including labor can range from $250 to $600 or higher. Getting a quote from a Thermador-authorized service provider before proceeding is advisable.

Replacing the Dreefs control board is a task that requires comfort working with electrical appliances and disconnecting wiring harnesses. A knowledgeable DIYer can complete the swap, but it involves accessing internal components and handling mains-voltage wiring. If you are not comfortable with this level of repair, a qualified appliance technician should perform the replacement.

Operating the range with an active E15 fault is not recommended. A failed control board can cause unpredictable behavior including improper temperature regulation or unresponsive controls. It is best to stop using the range until the Dreefs board has been replaced and the fault is resolved.