Machine fills but does not heat; may stop mid-cycle with F08 displayed.

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.

Possible Causes

Short-circuited heater element, Stuck heater relay on main control board, Wiring short-circuited to chassis, Faulty NTC sensor causing incorrect heater control

How to Fix / Troubleshooting

Safety: Disconnect power and ensure the tub is cool.

Inspect heater and wiring:
- Access the wash heater from the rear.
- Check for visible damage, burn marks, or melted insulation.
Test heater resistance and insulation:
- Disconnect heater wires.
- Measure resistance across the heater; if extremely low or short-circuited, replace the heater.
- Check for continuity between heater terminals and earth; any reading indicates a short to chassis.
Check NTC sensor: A faulty NTC can cause the control to mismanage heating; test and replace if it is out of specification.
If components test correctly: The heater relay on the main control board may be stuck or damaged; replace the control board.

Repair Difficulty

Hard 4/5

Required Part

Main Control Board (Heater Relay Circuit)

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