When to Act Immediately
If you smell burning from your heat pump, switch the system off at the controller and the isolator switch. Investigate the source. If you see smoke or flames, evacuate and call 999.
Common Causes of Burning Smell
- Dust burning on the indoor unit at first startup after summer (normal — passes quickly)
- Failed capacitor or burnt motor winding in the fan motor
- Overheating wiring or electrical fault
- Compressor overheating
What to Do
If the smell persists or occurs during normal operation (not just first startup), do not run the system. Call a qualified engineer immediately. Electrical faults in heat pumps can cause fires if ignored.
Sources: registered electrician and the safety regulator.
