Your boiler has detected that hot water is not flowing properly around your heating system, so it has shut down to prevent damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: lack of water circulation.
DIY fix possible
Check your central heating pressure gauge; if it is below 1 bar, use the filling loop to top it up to approximately 1.5 barEnsure all radiator valves and any system isolation valves are fully openOnce pressure is restored, reset the boiler using the reset button
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 30 40 50 60 70 80 [m m m l l l] — no call-out fees, no surprises.
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Chaffoteaux Minima HE 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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