BoilerFaultCodes BUBNEB STAYS ON Emergency
Your boiler is failing to light properly because it cannot correctly detect or control the flow of gas, which may cause it to keep trying to fire up when it shouldn't.
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) Air in pipework; II) Gas valve stays open; III) Venturi blocked; IV) Dirt on gas valve facing; V) Loose jumper on house stop cock tap; VI) Dirt foreign matter is water section; VII) Slow ignition device stuck
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 BUBNEB STAYS ON — no call-out fees, no surprises.
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Chaffoteaux Britony II 50FF 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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