BWT Overheating Electrical Component or Contaminant on Coil

Heater emits a strong chemical or burning smell during operation

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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

Dust or debris burning off heating surfaces, Overheating wiring or connectors, Failing fan motor or compressor winding insulation, Chemical residue on coil

How to Fix / Troubleshooting

Safety first: If you smell burning plastic or see smoke, turn off power immediately at the breaker.

  • Visual inspection: After the unit cools, open the control panel and inspect for discolored or melted wires, connectors, or PCB areas.
  • Check fan and coil: Look for plastic bags, leaves, or other debris stuck on the coil or fan that could be heating up.
  • Clean area: Remove any foreign material and clean dust from accessible surfaces.

If the burning smell returns or any components appear damaged, do not operate the heater. Contact a qualified technician to inspect and repair the electrical system.

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Repair Difficulty

Hard 4/5

Required Part

BWT Wiring Harness
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