Thermador Range Error Code F170

F170 on a Thermador range indicates that the control board detected a power failure or interruption to the unit. The board stores this fault in memory and displays the code after power is restored. It is essentially the range's way of logging that it lost power at some point. In many cases, a simple reset will clear the code if the underlying power issue has been resolved.

The F170 code itself is a notification of a past power event rather than an indicator of a dangerous component failure. However, you should confirm that the range is operating normally before using it, especially the oven and burners. If the code keeps returning or the range behaves erratically, stop using it and have the electrical supply and unit inspected before continuing.

Recurring F170 codes after resetting usually point to an ongoing instability in the power supply rather than a one-time outage. Possible causes include a loose terminal block connection, a weakening circuit breaker, voltage fluctuations from the utility, or deteriorating household wiring. If basic electrical checks at the breaker and terminal block do not resolve the issue, a licensed electrician should evaluate the dedicated circuit feeding the range.

Yes, in most cases resetting the range will clear the F170 code if the original power disruption has passed. You can reset the range by turning off the dedicated circuit breaker for 30 seconds and then turning it back on. If the code returns repeatedly, there is likely an ongoing issue with the power supply or wiring that needs to be addressed.

If the cause is simply a power outage or tripped breaker, there is no repair cost. If wiring connections at the terminal block need servicing, a technician visit typically runs in the range of $100 to $250 depending on your area. If a main control board replacement is needed, parts and labor combined can range from $350 to $700 or more. Having an electrician inspect the home wiring circuit may add additional costs.