Boiler emits a burning smell or visible smoke from casing
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Immediately turn off power at the fused spur and do not attempt to restart the boiler. If smoke is heavy or fire is suspected, evacuate and call emergency services.
User checks:
- Do not remove the boiler case. Ventilate the area and wait for an engineer.
Engineer checks:
- Inspect internal components for signs of burning or melted insulation.
- Check all electrical connections for tightness and overheating.
- Replace any burnt components such as PCB, wiring harness, fan, or pump.
- Verify safe operation with full electrical and combustion tests before returning to service.
Any burning smell from a boiler must be investigated urgently by a qualified engineer.