Low
Run on Ideal RD2

Your boiler is simply switched off or in standby mode and is not currently operating.

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

Off

Shared across the British / Scottish range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s 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 the boiler power supply is switched on at the fused spur.Check your central heating programmer, timer, or thermostat to see if a call for heat is currently scheduled.

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All 10 fault codes on the RD2

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

Application of powerControl 'stat open circuit or waiting for demandFan start upLED 3LED 4Lock-outPump over-runReverse polaritySensor Faults

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