High
Boiler Fault Finding 6 on Grant Vortex 20-26

Your boiler is struggling to breathe properly, causing the flame to struggle and the unit to make a repetitive pulsing or thumping sound.

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

Burner pulsates. Insufficient air supply – check the air damper setting and the condition of the fan.

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.

Find a Gas Safe engineer
Search the official register →

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