BoilerFaultCodes PILOT WILL NOT STAY ALIGHT High
Your boiler is failing to keep its small starter flame lit, which prevents the main system from firing up to provide you with heating or hot water.
Call an engineer soon
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: I) Thermocouple not working; II) Thermo-electric valve faulty; III) Gas pressure low/variable; IV) Terminal wrongly positioned; V) Badly assembled flue; VI) Gas pressure too hight
Typical repair cost £120-250 (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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Chaffoteaux Britony Duo 55 is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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