Low
S.22 on Glow-worm Easicom3 Combi

Your boiler is simply performing a routine internal check and preparing the internal pump before it starts heating your water; this is a normal operating status and not a fault.

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

Hotwaterhandlingmode:Pumppre-run

From this model's manual
Verified against the Glow Worm Easicom3 Combi installation & service manual, page 45.
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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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