Swan
Voltage Drop / Power Supply Instability
Display flickers, dims, or resets when the heater turns on.
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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, Loose neutral or live connection inside unit, Failing low‑voltage regulator on PCB, High resistance at heater terminals causing surges
How to Fix / Troubleshooting
Safety first: Unplug before opening the housing.
- Check outlet and circuit: Avoid using long extension leads or sharing the circuit with other high‑power appliances.
- Inspect internal connections: Open the unit and check all screw terminals and push‑on connectors for tightness, especially at the mains input and heater.
- PCB inspection: Look for bulging capacitors or heat‑damaged components in the low‑voltage section of the main PCB.
If flickering persists on a known good circuit with tight connections, the main PCB power supply is likely failing and should be replaced.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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