Low
Orange LED on on Sime Murelle HE System

Your boiler is currently in standby mode or switched off, which is a normal state when there is no demand for heating or hot water.

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

Stand-by / off — normal stand-by condition

From this model's manual
Verified against the P3 Sime Murelle He System installation & service manual.
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 if your thermostat or programmer is calling for heatEnsure the boiler power switch is in the 'ON' positionCheck that the gas supply is turned on if you have recently had work done

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