High
F83 on Heatline Vizo 24

Your boiler has detected that there is not enough water pressure inside the system for it to heat your home safely.

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

No water in the installation : the temperature does not increase when the burner is lit

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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