How to Fix / Troubleshooting

Safety: If you see smoke or flames, shut off power and gas immediately and call emergency services. Otherwise, proceed cautiously.

Initial use: A slight odor is normal on first startup of a new Crown boiler as oils burn off. This should dissipate after a few hours.
Inspect interior: With power off and boiler cool, remove the front panel and look for discolored or melted wiring, connectors, or plastic parts.
Check clearances: Ensure no combustible materials are stored against the boiler or flue pipe.
Fan motor: A failing fan can overheat and smell. Listen for unusual noises from the combustion fan.
Call a technician: Any persistent burning smell warrants a professional inspection.

Boiler emits a burning smell or plastic odor during operation

Possible Causes