BoilerFaultCodesYour boiler has tried to light several times but cannot detect a flame, meaning it has locked itself out 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 not detected.
What causes this fault?
This fault occurs when the boiler's control system fails to detect a flame after several ignition attempts. The most common reasons include a lack of gas reaching the burner, worn-out ignition components that can't create a spark, or a sensor that is too dirty to 'see' the flame even if it has lit.
This fault is frequently seen during extreme cold spells, as a frozen condensate pipe can back up and prevent the boiler from lighting.
DIY fix possible
Check if other gas appliances, like a hob, are working to ensure gas is reaching the propertyCheck if your gas meter credit has run out or if the semi-solid valve is bumpedIf it is freezing outside, check if your white plastic condensate pipe is frozen and defrost it with warm waterPress and hold the 'Reset' button for five seconds
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 EA — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Worcester Bosch RD 532i RD 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.