Low
S.109 on Glow-worm Energy7 Combi

Your boiler has entered a temporary sleep state and is waiting for a command to start heating again.

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

Product's standby mode activated

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 is set to a temperature higher than the current room temperature.Ensure your timer or programmer is set to an 'ON' period for heating or hot water.Press the 'Reset' button on the boiler control panel once to wake the system.

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