BoilerFaultCodesWhat the manual says
Manufacturer manualGreen neon illuminated - Power is connected to the boiler
What causes this fault?
This is not actually a fault, but a status indicator showing that your boiler is successfully receiving electricity from the mains supply. It means the internal circuitry is live and the unit is technically ready to provide heating or hot water when called upon. If the light is on but your heating isn't working, the issue likely lies with your thermostat settings or an internal component failure rather than an electrical supply problem.
DIY fix possible
Check that your room thermostat is turned upEnsure your programmer or timer is set to 'On'Check if the hot water tap is turned on if you have no heat
Avoid the next call-out bill
A cover plan would handle faults like Power On: no call-out fees, no surprise bills.
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