BoilerFaultCodesPotterton Power On Fault Code
Also written as POWERON — same fault.
The Potterton Power On fault code means: your boiler is receiving electrical power and is ready for normal operation.. It appears on 1 Potterton model in our database.
Technical description: Green neon illuminated - Power is connected to the boiler
What causes the Potterton Power On 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
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Potterton models that show the Power On fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Power On fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026