BoilerFaultCodesYour boiler has stopped working because it either cannot detect a flame or the internal drainage pipe for waste water is blocked.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame Failure or Blocked Condensate Drain
What causes this fault?
This fault occurs when the boiler tries to light but fails to detect a steady flame, causing it to shut down for safety. The most common reasons are a build-up of carbon on the sensing probe, a failure in the gas delivery, or a blockage in the pipe that carries waste water away from the unit.
This fault is frequently seen during freezing winter temperatures, as the external condensate drainage pipe can freeze and cause water to back up into the boiler.
DIY fix possible
Check if your gas prepay meter has credit and that the external gas stopcock is open.Inspect the plastic condensate pipe outside for signs of freezing or blockages.Thaw a frozen external pipe with warm (not boiling) water and reset the boiler.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 24 — no call-out fees, no surprises.
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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.
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