Hotpoint Cooktop Error Code F12

F12 indicates that the ISI UART 1 module, connected via CN 03, has detected an excessively high heatsink temperature. The cooktop shuts down to protect its internal power electronics from heat damage. This is most often related to a problem with the cooling fan or airflow around the heatsink.

No, you should not continue using the cooktop while F12 is active. The error indicates the internal electronics are overheating, and continued operation could cause permanent damage to the control boards or create a fire risk. Allow the unit to cool completely and resolve the underlying cause before attempting to use it again.

Repair costs vary depending on the cause. Clearing a blocked vent or reseating a connector costs little to nothing beyond a service call fee, which typically ranges from $75 to $150. Replacing a cooling fan motor generally adds $50 to $150 in parts, while a control board replacement can bring total costs to $200 to $400 or more depending on parts availability and labor rates in your area.

Some causes of F12 are DIY-accessible, such as checking that the cooling fan is properly plugged in, clearing debris from the vents, and ensuring the cooktop has adequate ventilation clearance. However, replacing a failed fan motor or a faulty control board involves working with high-voltage components and is best handled by a qualified technician.

A power reset may clear the F12 code temporarily if the heatsink has cooled down, but the error will return if the root cause has not been fixed. If the cooling fan is faulty or airflow is blocked, the heatsink will overheat again quickly and the code will reappear. A reset alone is not a repair.