Boiler produces a strong exhaust or burning smell near the unit

Safety first: If you suspect carbon monoxide or feel dizzy or nauseous, evacuate immediately and call emergency services. Do not operate the boiler until the issue is resolved.

• Step 1 – Inspect vent joints: With power off, check all visible vent and intake joints for signs of leakage, discoloration, or melted plastic. Tighten or re‑cement as needed using approved materials.
• Step 2 – Check for backdrafting: Ensure the boiler room has adequate combustion air. Avoid running powerful exhaust fans (kitchen, bath, dryers) that can depressurize the space.
• Step 3 – Look for burnt components: Remove the front cover and inspect for melted wire insulation or plastic near the burner or flue. Replace any damaged components.
• Step 4 – Professional combustion test: Have a licensed technician perform a combustion analysis and verify CO levels and burner adjustment.

Install carbon monoxide detectors near sleeping areas and in the boiler room as required by code.