BoilerFaultCodesWhat the manual says
Manufacturer manualMains electricity ON.
What causes this fault?
This is not a fault, but rather a status indicator showing that the boiler is successfully receiving electrical power from your mains supply. It confirms that the internal circuitry is live and the unit is ready to operate when there is a demand for heating or hot water. If the boiler isn't firing despite this light being on, the issue likely lies with your external thermostat or a different internal component.
DIY fix possible
Check if other control lights are flashing to indicate a real faultEnsure your room thermostat is turned up to call for heatNo action is required if the boiler is providing heating and hot water
Avoid the next call-out bill
A cover plan would handle faults like Neon I3: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.