Low
NO CH on Ideal Independent System S15

Your boiler's central heating mode is currently turned off or overridden by the controls.

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

GO TO SECTION 4.11

From this model's manual
Verified against the Ideal/Ideal G101 Ideal Independent System S18 4175070 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 or smart thermostat to ensure the heating is turned on and set above the current room temperature.Check that any heating timers or programmers are currently scheduled to be on.Verify that the boiler control panel is not set to 'Hot Water Only' mode.

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Related fault codes

NO DHWView →HOT WATER OFFView →

All 23 fault codes on the Independent System S15

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

F1F2F3F4F5F6F7F8F9FnFUL1L2L4L5L6L8L9LCLnNO DISPLAYNO HW

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