Kospel High Inrush / Electrical Disturbance

Heater operates but causes noticeable lights dimming or electrical interference in the home.

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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

Heater on a shared circuit with other loads, Undersized supply wiring, Loose supply terminals, Poor power factor or harmonics from control electronics

How to Fix / Troubleshooting

Safety: Electrical work should be done by a qualified electrician.

  • 1. Dedicated circuit: Ensure the Kospel heater is on its own dedicated circuit as per installation instructions.
  • 2. Check wiring size: Verify that cable cross-section meets Kospel’s requirements to minimize voltage drop.
  • 3. Tighten terminals: Tighten all supply and internal high-current terminals.
  • 4. Electrical assessment: If disturbances persist, have an electrician check the supply quality and consider installing power conditioning if necessary.
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Repair Difficulty

Medium 3/5

Required Part

Supply Wiring / Terminal Block
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