Thermador Range Error Code F190

The F190 code on a Thermador range indicates that the control board has detected a power over voltage condition, meaning the incoming electrical supply voltage is above the acceptable operating range for the appliance. The range triggers this fault to protect its electronics and heating components from damage caused by excessive voltage. The issue can originate from the utility supply, home wiring, or a faulty control board.

A reset by powering the range off at the circuit breaker for several minutes may clear the F190 code if the over voltage condition was caused by a temporary surge that has since passed. However, if the underlying cause such as elevated utility voltage or a faulty control board is still present, the code will likely return. Always verify the actual line voltage before assuming the problem is resolved.

Repair costs vary depending on the root cause. If the issue is limited to a supply voltage problem corrected at the electrical panel or utility level, electrician service fees could range from $100 to $300 or more. If the main control board requires replacement, parts and labor combined can range from $300 to $700 or higher depending on the specific model and local labor rates.

It is not advisable to continue operating the range while the F190 error is active. An over voltage condition can damage the control board, heating elements, and other internal components over time. Turn the range off and disconnect it from power until the source of the voltage issue has been identified and resolved.

Start by measuring the incoming line voltage at the range's receptacle or terminal block using a multimeter. If the voltage is confirmed to be too high, contact your utility provider or a licensed electrician to address the supply issue. If the voltage is within a normal range but the code persists, the main control board may need to be inspected and potentially replaced by a qualified technician.