Thermador Range Error Code E5

E5 on a Thermador range signals a potentiometer failure or a control board that is operating outside its acceptable temperature range, either too hot or too cold, or a control board that has become defective. The fault is detected by the board's internal diagnostics and locks out normal operation until the issue is resolved. A technician will typically inspect the potentiometer, wiring, and the control board itself to determine the exact cause.

It is not recommended to continue using the range while E5 is active. A failed control board or faulty potentiometer means the appliance cannot reliably interpret control inputs, which could lead to unpredictable burner or oven behavior. Discontinue use and have the fault diagnosed before operating the range again.

Resetting the range by cutting power at the breaker for a few minutes may temporarily clear the E5 code, but if the underlying component is faulty, the code will return during operation. A reset is useful for ruling out a one-time temperature spike or a transient fault, but a recurring E5 code points to a hardware problem that requires physical repair.

Some basic checks, such as clearing ventilation around the range or reseating wiring connectors, can be done by a careful homeowner. However, testing a potentiometer with a multimeter and replacing a control board require comfort with appliance disassembly and electrical components. If you are not experienced with appliance repair, it is safer to have a qualified technician handle the diagnosis and board replacement.

If the repair requires a control board replacement, parts alone typically range from $150 to $400 or more depending on the specific model, with labor adding another $100 to $200 in most markets. If only a potentiometer or wiring repair is needed, costs are generally lower, often in the $80 to $200 range including labor. Getting a diagnosis before ordering parts is the best way to control costs.