Termet
Voltage Drop / Power Supply Instability
Water heater display flickers or dims when the burner ignites.
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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
Undersized electrical circuit for Termet heater, Loose neutral or live connection, Failing internal power supply capacitor on PCB, Shared circuit with heavy loads
How to Fix / Troubleshooting
Safety: Electrical work should be done by qualified personnel.
- Check supply: Measure mains voltage at the heater while it starts. If voltage drops significantly, move the heater to a dedicated circuit or correct wiring issues.
- Inspect terminals: Tighten all terminal screws in the heater's power connection block.
- Avoid shared loads: Do not run high-power appliances on the same circuit as the heater.
- PCB repair: If supply is stable but flicker persists, the internal power supply on the PCB may be failing and the board should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Main Control PCB
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