BoilerFaultCodesWhat the manual says
Manufacturer manualLed OK (green)
What causes this fault?
This status occurs because the boiler is in its normal standby mode, having successfully reached the required temperature or completed its previous task. It is simply waiting for your thermostat to click on or for a hot water tap to be opened before it starts firing again. There is no physical fault or blockage preventing the system from working.
This code is more visible during summer months when your central heating is turned off and the boiler spends most of the day in standby mode.
DIY fix possible
Check that your room thermostat is turned up higher than the current room temperatureEnsure your programmer or heating timer is switched to an 'On' periodVerify that the boiler selector switch is set to the correct mode for heating or hot water
Avoid the next call-out bill
A cover plan would handle faults like L1: no call-out fees, no surprise bills.
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