Boiler emits a burning smell or plastic smell during operation

Safety: If the smell is strong or accompanied by smoke, turn off power and gas immediately and ventilate the area.

• 1. New boiler or first start of season: A mild smell may be normal as dust burns off. This should dissipate after a short period.
• 2. Visual inspection: With power off and cooled, remove the front panel and look for discolored plastic, melted insulation, or soot marks near electrical connectors.
• 3. Check fan and pump: Smell near the fan or pump may indicate overheating bearings. Replace the affected component.
• 4. Remove foreign objects: Ensure no packaging material or debris remains inside the casing or touching the flue or heat exchanger.
• 5. Professional check: If the source is not obvious, have a technician perform a full safety inspection.