429538 Genuine Thermistor Assembly Service Kit for Fisher & Paykel Washing Machines, Washer Water Temperature Sensor

Fisher & Paykel supplies this genuine thermistor assembly as a service kit under 429538, for its washing machines. A thermistor is a temperature sensor, letting the washer check how warm the water is so it can mix hot and cold correctly. Other thermistor kits, some packed with seals, are stocked under different numbers. With no models recorded against 429538, check your parts list or send us your model and serial number.

Washer water too hot, too cold or showing a temperature fault?

The thermistor changes its electrical resistance as temperature changes, and the washer's controller reads that to work out the water temperature. If the sensor fails or its wiring is damaged, the machine may fill with water that's too hot or cold for the program, take a long time to fill, show a temperature related error code, or stop part way through. Leaks around the sensor seal can also let water drip from beneath the bowl. A resistance test with a multimeter helps confirm the fault before ordering.

Part details

• Genuine Fisher & Paykel part 429538
• Thermistor assembly supplied as a service kit
• Temperature sensor for Fisher & Paykel washers
• Models not on file, check your parts diagram

Fitting the thermistor kit

Unplug the machine and shut off both taps. Find the thermistor on the bowl or in the water path, as shown in your parts diagram, and note how its wiring is routed. Remove the old sensor and any seal, clean the mounting point, and fit the new one so it seals properly. Run a warm wash and check for leaks and the correct water temperature.

Questions about this part

Can I test the old thermistor before buying?

Yes. With the washer unplugged, a technician can measure the thermistor's resistance and compare it with the value expected at room temperature. An open circuit, a short, or a reading far from specification points to a faulty sensor.