Bosch Cooktop Error Code F4

F4 on a Bosch cooktop means the User Interface control board detected an overheating condition and shut off all cooking zones as a safety precaution. This is a protective thermal shutdown built into the control system. The fault can be further investigated using service programme P7, where pressing the ninth sensor displays the F4 error counter to show how many times the fault has occurred.

No, you should not attempt to continue cooking until the underlying cause of the overheating has been identified and corrected. The cooktop will remain non-functional while F4 is active because all zones are disabled as a safety measure. Using the cooktop before addressing the root cause risks recurring faults and potential damage to the UI board.

Repair costs vary depending on the root cause. Ventilation corrections or fan cleaning involve minimal expense, while cooling fan replacement typically costs in the range of $80 to $200 including parts and labor. If the User Interface board itself requires replacement, costs can range from $200 to $500 or more depending on the model and labor rates in your area.

Some causes of F4 can be addressed without professional help, such as improving ventilation clearances around the cooktop or removing nearby heat sources. However, if the fault counter in P7 shows repeated occurrences, or if a cooling fan or the UI board itself needs replacement, a qualified technician should perform the repair. Accessing the service programme and correctly interpreting the fault counter also requires some technical familiarity with the appliance.

Powering the cooktop off and allowing it to cool may temporarily clear the F4 display and restore zone operation if the board temperature has dropped below the threshold. However, this does not resolve the underlying cause, and the error will return if the overheating condition persists. The fault counter in service programme P7 will continue to log each occurrence regardless of resets.