What does the Hotpoint F03 error code mean?
F03 (or 3 flashing lights) indicates that the dishwasher’s heating element or the NTC temperature sensor has failed. The machine cannot heat the wash water to the programmed temperature, which also severely impacts drying performance.
🔍 Symptoms
- Dishes are greasy and have a white film after washing
- Plastic items are wet and cold at the end of a cycle
- The drying phase seems not to work at all
- The inside of the machine feels cold even mid-cycle
- Cycles complete but glassware is cloudy
How to fix the HOTPOINT F03 error code
- Confirm the fault by opening the door mid-cycle on a 65°C programme. If the water is cold, the heater is the issue.
- Unplug the machine. The heating element on most Hotpoint dishwashers is located beneath the filter, around the sump assembly.
- Test the NTC temperature sensor with a multimeter — it should read approximately 10–15k ohms at room temperature.
- Test the heating element — a working element typically reads 20–40 ohms. An open circuit (no reading) confirms it has burned out.
- Replace the faulty part. On many Hotpoint models, the heater is accessible from the bottom of the machine after removing the sump cover.
Frequently Asked Questions (FAQ)
Q: Will the dishwasher still clean dishes without the heater working?
A: To a degree, but not properly. Cold water will not remove grease effectively, and dishes will not be sanitised. The drying phase will also be completely ineffective.
Q: Is F03 ever caused by something other than the heater?
A: Yes — a faulty NTC sensor will give the control board incorrect temperature readings, causing it to trigger F03 even if the heater itself is fine. Test the sensor first as it is cheaper to replace.
Q: Can I replace a Hotpoint dishwasher heating element myself?
A: Yes, with moderate DIY confidence. The machine needs to be unplugged and carefully laid on its back or side to access the sump and heater from underneath.
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