BoilerFaultCodesYour boiler has failed to ignite or stay lit, meaning the system has shut down for safety and cannot provide any heat or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No heating or hot water
What causes this fault?
This fault occurs when the boiler's control system attempts to start the burner but cannot detect a stable flame. The most common reasons include a lack of gas supply to the unit, a worn-out ignition spark, or a sensor that is failing to tell the boiler that the gas has successfully lit.
This fault is slightly more common in winter especially if the gas meter regulator freezes or if the boiler is working harder to ignite in very cold conditions.
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hob.Verify that your pre-pay gas meter has credit, if applicable.Press and hold the reset button for 2 seconds to see if the boiler restarts.
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 A — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Ideal C80ff & C95ff 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.