Low
S.109 on Glow-worm Energy System

Your boiler is currently in a temporary power-saving standby mode and is operating normally.

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 Energy System installation & service manual, page 34.
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 thermostat or programmer to ensure a heating or hot water demand is activeEnsure your boiler's internal clock or timer is set to the 'On' or 'Clock' positionWait a few moments for the boiler to wake up once a demand is detected

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