BoilerFaultCodesTechnical description
Maximum number of refills reached
What causes this fault?
This fault occurs when the boiler's Intelligent Filling System detects that it is adding water too frequently to maintain pressure. It suggests that water is escaping from your central heating system, usually through a pipe leak or a faulty component like the expansion vessel. To prevent potential flooding or damage, the boiler stops refilling automatically and shuts down.
This fault often appears in autumn when the heating is first turned on after summer, as the change in temperature and pressure can expose small leaks or weakened seals.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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