BoilerFaultCodesYour boiler is failing to light the burner correctly, which is preventing it from heating your home.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Indicates ignition sequence status. If no flash, check PCB or main coils.
What causes this fault?
This fault occurs when the boiler's control system attempts to light the burner but fails to detect a successful flame. The most common reasons are a malfunctioning ignition board that isn't sending power to the spark, or faulty coils on the gas valve that are preventing fuel from flowing into the burner.
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 Discharge tube on ignition PCB flash — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Glow-worm Energysaver 60 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.