Fisher & Paykel Dryer Error Code F4

The F4 code means the dryer's control board detected no temperature increase over a two-hour period while the heating element was turned on. The board continuously monitors the thermistor signal during a cycle, and if heat never rises as expected, it stops the cycle and logs F4. This points to a problem in the heating circuit or the temperature sensing system.

No, you should not continue running the dryer while F4 is active. The error indicates the heating system is not functioning correctly, and operating the dryer in this condition will not dry your clothes effectively. More importantly, some underlying causes such as a failing thermal fuse or restricted airflow can create fire hazards if ignored.

Repair costs vary depending on which component has failed. A thermal fuse replacement is typically the least expensive repair, while a heating element or thermistor replacement will cost more once parts and labor are included. In general, expect to spend somewhere in the range of $100 to $350 for a professional repair, depending on your location and the specific parts required.

Some causes of F4 are DIY-friendly, such as clearing a blocked lint filter or straightening a kinked exhaust hose. However, replacing a heating element, thermal fuse, or thermistor requires disassembling the dryer cabinet and working near high-voltage components, which is best suited for technicians or experienced DIYers comfortable with appliance repair. Always disconnect power before inspecting any internal components.

A power reset may clear the code temporarily, but if the underlying fault still exists the error will return during the next drying cycle. The F4 code is triggered by a real performance failure in the heating or sensing circuit, so a reset alone is not a repair. The root cause must be diagnosed and corrected for the fault to stay resolved.