Fisher & Paykel Washer Error Code F3

The F3 error code on a Fisher & Paykel washer indicates that the water temperature inside the drum has exceeded 176°F (80°C). This threshold represents an unsafe or abnormal operating condition, and the control board triggers the fault to prevent potential damage to fabrics, internal components, or the machine itself. The temperature monitoring system relies on a sensor submerged in or near the wash water, which sends a resistance-based signal to the electronics. When that signal reflects a temperature above the 176°F limit, F3 is logged.

There are four primary sources of this fault. The heating element may have failed in a shorted or continuously-on state, meaning it is applying heat even when the control board has not commanded it to do so. Alternatively, the temperature sensor itself may have drifted out of calibration or failed, causing it to report an incorrectly high temperature reading even when actual water temperature is normal. A third possibility is an analog-to-digital converter (ADC) failure on the control board electronics, which would cause misinterpretation of the sensor signal. Finally, if the incoming hot water supply is already above 176°F, such as from an industrial or unusually high-set water heater, the washer will trigger F3 without any internal component fault.

Diagnosing this code correctly requires determining whether the temperature is genuinely elevated or falsely reported. Checking the incoming hot water supply temperature with a thermometer is a logical starting point. From there, testing the temperature sensor for correct resistance values and inspecting the heating element for continuity and signs of shorting will help isolate the root cause before any parts are replaced.