Defro
Overheating Component / Electrical Insulation Smell
Boiler emits a burning smell or plastic odor during operation.
Advertisements
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.
Advertisements
Possible Causes
Dust burning off new Defro boiler components, Overheating pump or fan motor, Loose electrical connection causing arcing, Foreign object touching hot flue or heat exchanger
How to Fix / Troubleshooting
Safety: If you see smoke or suspect an electrical fire, turn off power immediately and contact emergency services.
- New boiler: A slight smell during the first few hours of operation can be normal as protective oils burn off. This should dissipate quickly.
- Visual inspection: With power off, remove the cover and look for discolored plastic, melted insulation, or signs of overheating on the Defro pump, fan, and wiring.
- Check clearances: Ensure no packaging materials, cable ties, or insulation are touching the flue or heat exchanger.
- Professional check: Persistent or strong burning smells require a technician to test motor currents and inspect all electrical connections.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Defro circulation pump
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements