BoilerFaultCodes PILOT WILL NOT STAY ALIGHT Emergency
Your boiler's pilot light is failing to remain lit, which prevents the main burner from igniting and means you currently have no heating or hot water.
Act immediately
Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now — this fault can be dangerous if ignored.
Technical description: i) Thermocouple not working ii) Thermoelectric valve faulty iii) Gas pressure low/variable iv) Terminal wrongly positioned v) Badly assembled flue vi) Gas pressure too high vii) Water rate too high viii) Incorrect venturi ix) No venturi fitted
Typical repair cost £120-220 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like PILOT WILL NOT STAY ALIGHT — no call-out fees, no surprises.
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