Fisher & Paykel Washer Error Code Err 10

Err 10 on a Fisher & Paykel washer indicates a malfunction in the heater NTC (Negative Temperature Coefficient) thermistor. The NTC thermistor is a temperature-sensing resistor located near the heating element that continuously monitors water temperature during the wash cycle. As water temperature changes, the NTC's resistance value shifts predictably, and the control system uses that resistance reading to regulate heating. When the NTC sends a signal outside the expected resistance range, or sends no signal at all, the machine logs Err 10. This code appears at the end of the program rather than immediately, meaning the washer completes its cycle before flagging the fault.

The most common trigger for Err 10 is a wiring or connection problem rather than outright thermistor failure. The first diagnostic step is always to check the wiring harness at the NTC sensor itself and at connector CN14 on the display PCB. A loose, corroded, or damaged connector at either end of that circuit can produce resistance readings that fall outside normal parameters, causing the control board to register the sensor as faulty. Intermittent connection issues are particularly common and can be difficult to reproduce.

If the wiring and connectors check out, the NTC thermistor itself may have drifted out of specification or failed entirely. A failed heater element can also damage the NTC if the two components are closely coupled. Testing the thermistor with a multimeter for correct resistance values at a known temperature will confirm whether the sensor itself needs replacement. In some cases, the display PCB and its CN14 connector circuit may be at fault if all other components test correctly.