High
Lockout (Red) light is on on Potterton Suprima HE

Your boiler has stopped working because it couldn't safely ignite the flame after several attempts, so it has shut down to protect itself.

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

Boiler failed to light after five attempts (possibly due to air in the gas supply)

From this model's manual
Verified against the Potterton Boiler Suprima 30 80he 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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