A01 High
Your boiler has failed to light the flame, which means you currently have no heating or hot water.
Technical description: No burner ignition
Typical repair cost: £100-350 (including labour)
DIY fix possible
Check if your gas supply is turned on and other gas appliances are workingPress the 'Reset' button on the boiler control panel for 1 secondCheck that your condensate pipe (outside) has not frozen during 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 lead
- PCB
*Affiliate links — we may earn a commission at no extra cost to you.