Thermador Range Error Code F151

F151 on a Thermador range indicates an EEPROM failure or a communication circuit error between the Display Board and the Power Board. The EEPROM is a small memory chip that stores configuration and calibration data the range needs to operate. When this memory fails or the communication path is broken, the range cannot function normally and displays the F151 code. Diagnosis starts with inspecting the Display Board connector P1B and associated wiring.

Resetting the range by disconnecting power for a few minutes may temporarily clear the F151 code, but it will almost certainly return if the underlying hardware problem has not been addressed. EEPROM failures and board communication faults are hardware issues that do not resolve on their own. A reset is useful only as a quick test to confirm whether the fault is persistent.

Repair costs vary depending on which component needs to be replaced and local labor rates. If only the wiring or connector needs attention, costs are minimal. If a Display Board replacement is required, parts and labor typically range from around $200 to $450. If the Power Board also needs to be replaced, the total repair cost could range from $350 to $600 or more depending on parts pricing and service fees in your area.

A knowledgeable DIYer can start by checking that the wiring connector P1B on the Display Board is fully seated and shows no signs of corrosion or damage. If the connector looks good and the fault persists, fixing the issue requires replacing the Display Board or Power Board, which involves working inside the range with the power disconnected. If you are not comfortable accessing internal components, a qualified appliance technician is recommended.

An active F151 fault means the control system cannot reliably read its stored settings and may not be able to accurately manage cooking functions. Using the range in this state is not recommended, as the control board may not regulate temperatures or respond to inputs correctly. It is best to stop using the appliance and have the fault diagnosed before resuming normal use.