High
EE1 on Grant Vortex Blue

Your boiler has detected too much pressure inside the system because the water isn't moving around properly or there is trapped air.

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

High pressure – circulating pump failure orcircuit air locked

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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