A01 High
Your boiler has tried to light several times but cannot establish a flame, meaning your heating and hot water will not work.
Technical description: No burner ignition – possibly no gas, detection or ignition electrode fault, defective gas valve, incorrect inlet gas pressure
Typical repair cost: £120-350 (including labour)
DIY fix possible
Check that your gas emergency control valve is open and any pre-payment meters have credit.Check if other gas appliances in your home, such as a hob, are working correctly.Press the 'reset' button on the boiler control panel for 1 second 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 (Control Board)
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