Low
Standby on Ideal Isar HE

Your boiler is currently idle because it is not receiving a signal from your thermostat or timer to provide heat 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

no demand for heat

From this model's manual
Verified against the Ideal Isar He Combi 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 your room thermostat and ensure it is set to a temperature higher than the current room temperature.Check your programmer or timer to ensure it is set to an 'On' period for both heating and hot water.Verify that there is power to the boiler and that the display is not blank.

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