High
Burner reset light red/orange inverted flash (2.5s on, 0.5s off) on Grant Vortex Blue

Your boiler's internal cooling and combustion fan has stopped working, preventing the burner from starting up safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

Lockout: fan motor error — faulty or disconnected fan motor

From this model's manual
Verified against the Grant Vortexblue Doc0131 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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Related fault codes

LockoutView →1 long flashView →Rapid flashView →

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