Fisher & Paykel Cooktop Error Code F3

F3 is a temperature fault code triggered when the burner thermistor sends a reading outside the acceptable limits of -22°F (-30°C) to 221°F (105°C). A reading at either extreme indicates the thermistor has most likely failed rather than an actual temperature event at those extremes. The cooktop disables the affected burner until the fault is corrected. Diagnosis starts with inspecting and testing the burner board thermistor.

The cooktop disables the burner associated with the fault as a protective measure, so operating that specific burner is not possible while F3 is active. You should not attempt to bypass the fault or continue using a burner that is producing erratic behavior. Resolve the thermistor fault before returning the cooktop to full use.

Repair costs depend on which component has failed. A replacement thermistor is typically the least expensive part, while a burner control board replacement carries a higher parts cost. Adding a technician's labor for diagnosis and repair, total costs can range from around $100 to $350 or more depending on the specific component needed and local labor rates.

A knowledgeable DIYer can check the thermistor connector for corrosion or loose pins and inspect the wiring harness for visible damage, which may resolve the fault without parts. However, if the thermistor itself or the burner board needs replacement, some comfort with appliance disassembly and multimeter use is required. If you are unsure about working with electrical components, a qualified appliance technician is recommended.

Resetting the cooktop by cutting power at the breaker and restoring it may temporarily clear the display, but F3 will return as soon as the control system polls the thermistor again and reads an out-of-range value. A reset does not correct the underlying hardware fault. The thermistor, wiring, or burner board must be inspected and repaired for the code to stay clear.