Boiler emits unusual smells, such as oil fumes or burning odours, especially when firing.

Critical safety: If you smell strong fumes or suspect flue gases, turn off the boiler and ventilate the area. Do not use the boiler until checked.

User actions:

• Visually check around the burner and oil line for signs of oil drips; do not touch.
• Ensure the flue terminal is not blocked.

Engineer actions:

• Inspect the burner assembly for oil leaks and tighten or replace oil line fittings.
• Clean the combustion chamber and baffles of soot and re-commission with a flue gas analyser.
• Check for overheating electrical components (discoloured wiring, smell of burnt insulation) and replace as needed.