BoilerFaultCodes MAIN BURNER DOES NOT LIGHT/MAIN BURNER High
Your boiler is failing to ignite because it is not receiving enough gas or water flow to start the heating process safely.
Call an engineer soon
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: i) Gas service tap not open fully ii) Gas pressure low iii) Water rate low iv) Gas valve push rod jammed v) Diaphragm punctured vi) Venturi blocked or loose vii) Gas control tap faulty viii) Injector size
Typical repair cost £120-250 (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 DOES NOT LIGHT/MAIN BURNER — 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.