High
Amber neon (on panel) on Grant Outdoor Combi 90 Mkii

Your boiler has detected that the water pressure in the system is too low to run safely and has switched itself off to prevent damage.

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

Low pressure cut-out activated

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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