Low
Orange LED on on Sime Ecomfort Plus HE

Your boiler is currently in standby mode and is working exactly as it should while waiting for a request 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 Sime/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 that your room thermostat is turned upEnsure your programmer or timer is set to ONTurn on a hot tap to see if the light changes to green

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Related fault codes

Green LED onView →Red LED onView →

All 11 fault codes on the Ecomfort Plus HE

Seeing a different code? Every code this model can display, in one place.

Flashing orange LEDG20G30G31JP4LED flashing after fanOrange LED flashingRed LED after flow switchRed LED on (after safety stat)Red LED on (solid)

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