High
1 07 on Ariston Clas System 28

Your boiler has detected that water is not flowing around your heating system properly, so it has shut down to prevent itself from overheating.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Insuffi cient circulation

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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