A01 High
Your boiler has failed to light the flame, which means you will not have any heating or hot water until the issue is resolved.
Technical description: Ignition error – possible electrode fault or power too low, no gas or excessive condensate level
Typical repair cost: £90-280 (including labour)
DIY fix possible
Check that your gas pre-payment meter has creditEnsure your external gas emergency control valve is turned onPress the 'Reset' button on the boiler control panel for 1 secondCheck that the white plastic condensate pipe outside has not frozen in cold weather
Protect yourself from future repair bills
A boiler cover plan would cover faults like A01 — no call-out fees, no surprises.
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Parts commonly replaced
- Ignition electrode
- Gas valve
- Ignition PCB
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