Immergas Overheating Components / Electrical Smell

Furnace emits a burning smell or plastic odor when running

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.

Possible Causes

Dust burning off heat exchanger (new or after long idle), Overheating pump or fan motor, Loose electrical connection causing arcing

Safety: If you see smoke or suspect an electrical fire, turn off power immediately and contact emergency services.

Steps:

1. New installation: A mild smell for the first few hours of operation can be normal as oils and dust burn off. This should dissipate.
2. Persistent or strong smell: Turn off the boiler and remove the cover. Look for discolored plastic, burnt wiring, or soot marks.
3. Technician inspection: Tighten electrical connections, replace overheated components (pump, fan, connectors), and verify current draw.

Hard 4/5

Circulation Pump or Flue Fan

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