De Dietrich
Voltage Drop / Power Supply Instability
Washer-dryer display flickers or resets when heater or motor starts
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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
Weak mains supply or overloaded circuit, Failing mains interference filter, Loose neutral or live connection inside machine, Internal power supply fault on control board
How to Fix / Troubleshooting
Safety: Unplug the appliance before internal inspection. Mains work should be done by qualified personnel.
- 1. Check household circuit: Avoid running the washer-dryer on the same circuit as high-power appliances. Ensure the breaker and wiring are correctly rated.
- 2. Inspect mains connections: Open the rear or top panel and check the terminal block, mains filter, and control board power input for loose screws or connectors. Tighten as needed.
- 3. Mains filter: Replace the EMI filter if it shows signs of overheating or if voltage drop is suspected across it.
- 4. Control board: If external supply is stable but flickering persists, the board's internal low-voltage supply may be failing and the board should be replaced.
Warning: Do not operate the machine with known loose mains connections; this is a fire risk.
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Repair Difficulty
Hard
4/5
Required Part
Mains Interference Filter
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