Fisher & Paykel Dishwasher Error Code F31

F31 is an over temperature fault, indicating the dishwasher detected water temperature exceeding safe operating limits, specifically above 85°C. The machine stops the cycle automatically to prevent damage to internal components. This can be caused by hot water supply issues, a faulty heating element, or a defective temperature sensor.

No, you should not continue running the dishwasher until the cause of the F31 fault is identified and corrected. Water temperatures above 85°C can damage seals, plastic components, and other internal parts. Running the machine in this condition risks worsening the fault or causing additional damage.

Repair costs depend on the cause. If only a thermostat or temperature sensor needs replacement, costs are generally in the range of $100 to $250 including parts and labor. A heating element replacement may fall in the range of $150 to $350 depending on parts availability and labor rates in your area. If the issue is simply an overheated water supply requiring no parts, the cost may only be a service call fee.

If the fault is caused by an overly hot household water supply, you may be able to resolve it by lowering your hot water heater's thermostat setting and confirming the incoming water temperature is below 85°C. However, if the cause is a failed heating element, thermostat, or temperature sensor, those repairs typically require component testing and replacement, which is best handled by a qualified technician.

A reset may clear the fault code temporarily and allow the machine to start a new cycle, but the code will return if the underlying cause has not been addressed. If the incoming water temperature is still too high or a component like the heating element or thermostat is still faulty, the F31 fault will reappear. Always resolve the root cause before relying on a reset.