F.29 High
Your boiler was working but the flame has gone out unexpectedly, often due to an interrupted gas supply or a blockage in the drainage pipe.
Technical description: Flame extinguished
Typical repair cost: £100-£280 (including labour)
DIY fix possible
Check that your gas emergency control valve is open and you have credit on your meter.If it is freezing outside, check if the plastic condensate pipe leading outdoors is frozen and thaw it with warm water.Press the 'Flame/Cross' reset button for one second to see if the boiler restarts.
Protect yourself from future repair bills
A boiler cover plan would cover faults like F.29 — no call-out fees, no surprises.
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Parts commonly replaced
- Ignition electrodes
- Gas valve
- Flame sensing electrode
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