How to replace the temperature sensor in your dishwasher

Introduzione

If your dishwasher isn’t heating up—or is overheating and shutting down—it may not be the heater’s fault. In many cases, the problem lies with a faulty temperature sensor or thermostat. These small components control the wash cycle temperature by sending data to the control board.

Not sure if this is your issue? Check out the Dishwasher Troubleshooting section to explore other possible causes before starting the repair.

Replacing a broken NTC sensor is straightforward, and the part is inexpensive—usually around €10 to €15.

Cosa ti serve

Passo 1 Isolate electrical power

Unplug the dishwasher from the mains before any work begins.
Never touch internal wiring with the appliance connected.

Passo 2 Confirm temperature‑related fault

Compare wash water temperature with program settings; unexpected cold cycles indicate a faulty sensor.
Symptoms are almost identical to a failed heating element, so rule that out first.

Passo 3 Locate the temperature sensor

Look for the sensor near the heater on the tub floor in roughly ninety percent of models.
If it is not on the tub floor, inspect the door panel because some machines place the sensor there.
Most sensors are found underneath the tub, near the heating element, or inside the door. If you're unsure, check the device page of your specific model for diagrams.

Passo 4 Remove the decorative cover

Unscrew or unclip the lower decorative plate to expose the sensor mounting area.

Passo 5 Identify the sensor type

Determine whether the part is a bimetal thermostat, an NTC probe, or a combined design used in some models.
Expect an NTC probe to cost around fifteen euros depending on the spare‑parts supplier.
Release the sensor clip and pull the sensor straight out of the housing.
Keep the rubber gasket on the sensor for reference or reuse.

Passo 6 Seat the new sensor and gasket

Press the rubber gasket fully into the tub opening to prevent leaks.
Push the new sensor into place until it locks flush with the gasket.

Passo 7 Secure the sensor and reconnect wiring

Tighten the sensor retaining ring or fasteners evenly without over‑torquing.
Reconnect the two sensor wires; polarity is irrelevant on NTC probes.
For thermostat types match the colored dot or markings recorded during removal to keep correct orientation.

Passo 8 Refit the decorative cover

Reattach the decorative plate and its fasteners to restore the dishwasher’s appearance.

Passo 9 Power‑up and verify operation

Restore power, run a short wash cycle, and confirm the appliance reaches the correct temperatures.
Monitor for leaks around the sensor sealing area during the first cycle.
If the machine still misbehaves, consult a qualified technician.

Conclusione

With the new sensor fitted, your dishwasher should heat water correctly and clean efficiently again. Always document any repairs for warranty purposes and keep the old part for comparison. If uncertain at any stage, stop and seek professional help—safety and warranty compliance remain your responsibility.