F1 High
Your boiler has failed to light the gas flame despite several attempts, causing the system to shut down for safety.
Technical description: Ignition fault (lockout) Boiler failed to light
Typical repair cost: £100-£280 (including labour)
DIY fix possible
Check if other gas appliances, like a cooker, are working to confirm gas supply.Verify that your gas meter has credit if you have a prepayment meter.Press the 'Reset' button (often indicated by a flame with a line through it) and hold for two seconds.
Protect yourself from future repair bills
A boiler cover plan would cover faults like F1 — no call-out fees, no surprises.
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Parts commonly replaced
- Ignition Electrode
- Gas Valve
- Ignition Lead
- Printed Circuit Board (PCB)
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