F.1 High
Your boiler has failed to ignite and is not producing heat, which is usually due to an interrupted gas supply or a problem with the internal spark system.
Technical description: Lack of gas, a fault with the ignition or flue – may need to adjust the gas valve or replace a defective electrode lead.
Typical repair cost: £100-280 (including labour)
DIY fix possible
Check if other gas appliances, like a cooker, are working to confirm gas is reaching the propertyEnsure your gas meter has credit if you use a pre-payment accountPress the reset button (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 F.1 — no call-out fees, no surprises.
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Parts commonly replaced
- Ignition electrode
- Spark generator
- Gas valve
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