Bosch Range Error Code F190

F190 means the range's control board detected an overvoltage condition on the incoming power supply at the moment the unit powered on. The board measures line voltage during its startup sequence and shuts down or restricts operation if the voltage reads above its acceptable limit. The problem can originate from the utility, your home's wiring, or a faulty sensing circuit on the control board itself.

Start by measuring the voltage at the 240V range outlet with a multimeter. Each leg to neutral should read approximately 120V, and leg-to-leg should read approximately 240V. If voltage is elevated, contact your utility or a licensed electrician to address the supply issue. If voltage is normal, inspect the neutral wire connections at the outlet, junction box, and range terminal block for looseness or corrosion. If connections are solid and voltage is correct, the main control board likely needs replacement.

Cycling power may temporarily clear F190 if the original trigger was a brief voltage spike that has since resolved. However, if the underlying cause, such as a loose neutral or elevated utility voltage, is still present, the code will return at the next power-on cycle. Confirm actual outlet voltage is within spec before relying on a reset as a solution.

You should not continue using the range while F190 is active. The code indicates the control board detected excessive voltage, which can damage the board, relay components, and electronically controlled burner modules if the unit keeps running under those conditions. Stop using the range and measure the outlet voltage with a multimeter before attempting to reset or restart it.

If the fix is a wiring correction at the outlet or panel, an electrician may charge between $75 and $200 depending on the scope of work. If the main control board needs replacement, the part typically costs $150 to $350 depending on the range model, with labor adding $100 to $200 if you hire a technician. A capable DIY repair person comfortable with appliance disassembly can replace the control board themselves using the model-specific service manual, which reduces cost to the part alone.