F.29 High
Your boiler was lit but the flame has gone out unexpectedly, which has caused the system to stop working for safety.
Technical description: Flame loss
Typical repair cost: £100-£350 (including labour)
DIY fix possible
Check that your gas emergency control valve is open and you have credit on your gas meterPress the 'Reset' button (indicated by a flame with a cross through it) for five secondsDuring freezing weather, check if your external white plastic condensate pipe has frozen and thaw it with warm water
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 electrode
- Gas valve
- Flame rectification sensor
- Gas meter regulator
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