Medium
16 on Alpha 240XE

Your boiler is struggling to get rid of trapped air inside the system, which is preventing the hot water from circulating correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Automatic air vent

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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