High
RED fast blinking (0.2s) on Grant Vortex Pro 15-26

Your boiler has failed to start after several repeated attempts and has now automatically shut down for safety to prevent fuel buildup.

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.

Technical description

Lockout for maximum number of re-cycles

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

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