Low
S.02 on British Gas 330+

Your boiler is simply completing a brief preliminary check of its pump before it starts the main ignition process.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

pump pre-run

From this model's manual
Verified against the British Gas 330 installation & service manual, page 47.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required; this is a normal operating status and not a permanent fault.Wait up to 20 seconds for the code to disappear and the boiler to fire up.If the code persists for several minutes without the boiler starting, try resetting the boiler once.

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