BoilerFaultCodesYour boiler is failing to light or stay lit, meaning it cannot safely generate heat and has locked itself out.
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 (loss of flame during operation or 5 unsuccessful start attempts)
What causes this fault?
This fault occurs when the boiler's control system cannot detect a steady flame after trying to ignite several times. The most common reasons are a worn-out ignition spark, a dirty sensor that can't 'see' the flame, or an unstable gas supply preventing a smooth arrival of fuel. Without a confirmed flame, the boiler shuts down as a safety precaution to prevents unburnt gas from building up.
This fault is more common during the first cold snap of autumn when components that have sat idle all summer are suddenly forced to work under high demand.
DIY fix possible
Check that your gas meter has credit (if on a prepay meter)Check that other gas appliances in the home are working correctlyPress the 'Reset' button on the boiler control panel for 2-3 seconds
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E04 — no call-out fees, no surprises.
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Remeha Quinta 115 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.
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