F07
Hotpoint-Ariston
Heater Relay Stuck / Heating Circuit Fault
Washer-dryer does not heat water; cycle may run long or stop with F07 displayed.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open-circuit wash heater element, Faulty heater relay on main board, Loose heater wiring, Faulty NTC sensor causing heater lockout
How to Fix / Troubleshooting
Safety: Unplug the appliance. Heating components can retain heat; allow to cool.
- Access the wash heater:
- Remove the rear panel.
- Locate the heater element at the bottom of the tub with two power terminals and an earth connection.
- Check wiring:
- Ensure heater terminals are tight and free from burning.
- Inspect the harness back to the control board.
- Test heater element (for multimeter users):
- Disconnect the heater wires.
- Measure resistance across the heater terminals; typical values are 20–30 Ω.
- Infinite resistance indicates a failed heater that must be replaced.
- Check for earth leakage:
- Measure between each heater terminal and earth; there should be no continuity. Any reading suggests insulation breakdown.
- If heater and wiring are OK: The heater relay or control board is likely faulty. Replace the main control board.
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Repair Difficulty
Hard
4/5
Required Part
Wash Heater Element
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