High
RED flashing (Reset button) on Grant Vortex Eco External Floor Standing

Your boiler has disabled itself for safety after multiple failed attempts to start the burner, and it now requires a specific cooling period or a professional reset to clear the lock.

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

Reset push-button locked after being pressed five times in succession without burner restart

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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