The temperature sensor, or thermistor, tells the machine's control board exactly how hot the wash water is, allowing it to manage the heating element accurately. A faulty sensor can cause water to overheat, underheat, or fluctuate unpredictably, even when the heating element itself is working perfectly.
Signs You Need Temperature Sensor Repair
- Water temperature doesn't match the selected cycle setting
- Wash water feels too hot or too cold consistently
- Error code referencing a temperature fault
- Heating element runs continuously without cutting off
- Cycle temperature fluctuates during a single wash
- Machine fails to reach the required hygiene-wash temperature
What's Involved
We test the sensor's resistance readings at different temperatures against the manufacturer's expected values, which quickly confirms whether the sensor is reading accurately or has drifted out of calibration. A faulty sensor is replaced with a matching part and recalibrated against the control board, and we test a full hot cycle afterward to confirm the temperature holds steady and matches the selected setting.
Common Causes
Temperature sensors drift or fail from age and from repeated heat cycling over years of commercial use, and they can also be damaged by mineral scale building up around the sensor housing in hard-water areas.
Why Choose Washing Machines Tech
We test sensor accuracy against known reference values rather than swapping the part on a guess, which matters for laundries that need to hit specific hygiene-wash temperatures consistently.
Inconsistent wash temperatures usually trace back to the sensor, not the element. Get it tested properly before replacing the wrong part.