Low
S.31 on Glow-worm Energy7 Combi

Your boiler is currently idle because it has been set to summer mode or your thermostat is not calling for heating.

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

No heating demand: Summer mode, eBUS control, waiting period

From this model's manual
Verified against the Glow Worm Energy7 Combi installation & service manual, page 51.
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

Check your room thermostat or smart controller settings to ensure the heating is set to 'On' and the target temperature is higher than the current room temperature.Verify that your boiler display is not set to 'Summer' or 'Hot Water Only' mode if you actually require central heating.Ensure any external programmer or timer is currently within an active heating schedule.

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Related fault codes

S.30View →S.32View →

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