BoilerFaultCodes Main burner “lifts” Emergency
Your boiler is struggling to breathe properly because it is recycling its own exhaust fumes, which means it cannot burn gas safely.
Act immediately
Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now — this fault can be dangerous if ignored.
Technical description: Re-circulation of flue products. Terminal badly sited and flue set wrongly assembled. Terminal not fitted in wall liner. Over-gassed. Check sealing of blue.
Typical repair cost £150-350 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Main burner “lifts” — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Chaffoteaux Corvec 28 OF BF is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.