High Lockout
E065 on Vokera Evolve

Your boiler has detected an electrical issue with the part that controls how much gas is burned, causing the system to shut down for safety.

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

Current modulation alarm

What causes this fault?

This fault occurs when the boiler's main control board loses the ability to properly manage the flow of gas to the burner. It is typically caused by a failing electrical coil on the gas valve or a breakdown in the communication between the valve and the circuit board. Because the boiler cannot safely regulate the flame size, it shuts down to prevent damage or unsafe operation.

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

E011View →

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