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 – possible electrode error, defective gas valve or incorrect inlet gas pressure
Typical repair cost: £120-£350 (including labour)
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the property.Verify that your gas prepaid meter has credit, if applicable.Press the 'Reset' button on the boiler control panel once to see if the system restarts.
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
- PCB (Printed Circuit Board)
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