BoilerFaultCodesYour boiler thinks a flame is burning even though it hasn't actually sparked or started, causing it to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame signal without flame present
What causes this fault?
This fault occurs when the boiler's internal sensors mistakenly detect a flame signal while the burner should be off. The most common reason is a faulty or contaminated sensing electrode that is sending a false electrical signal to the control board, preventing the boiler from starting for safety reasons.
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 228 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
Affiliate links — we may earn a commission at no extra cost to you.