Low
Orange LED on on Sime iQE Comfort 30

Your boiler is simply in standby mode or switched off, indicating it is waiting for a command to start heating or providing 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

Ensure the boiler power switch is in the 'ON' positionCheck that your room thermostat or programmer is calling for heatCheck if the hot water tap is turned on if you require hot water

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