High
RED, GREEN blinking inverted on Grant Vortex Eco External Floor Standing

Your boiler has detected an internal electrical issue affecting the fuel delivery system, which is preventing it from firing 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.

Technical description

Malfunction in the internal control circuit that drives the oil valve. Faulty oil valve; Internal control circuit that drives the oil valve faulty.

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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