Hotpoint washing machine F03 error code
F03 means heater/thermistor fault. The water temperature reading is out of range — the thermistor (temperature sensor) or heater has failed.
Often fixable at home · Fault type: Electrical/hardware
Safe checks, in order of likelihood
- Unplug, wait 1 minute, restart — clears one-off sensor trips.
- Run a cold wash as a workaround while you arrange a repair.
Call a professional when…
If the code returns after these checks, book a qualified engineer.
Parts usually involved
- Thermistor
- Heater element