BoilerFaultCodesTechnical description
The display shows alternatively the CH flow temperature and PC reminding that the next service is due. The burner service interval of 2324 hours has run out. See service function 5.A.
What causes this fault?
This message is triggered by an internal countdown timer that tracks exactly how many hours the burner has been active. Once the boiler reaches its pre-set limit of operating hours, it displays this code to notify you that the internal components are due for a professional safety check. It is not a mechanical failure, but rather a built-in maintenance reminder similar to a service light on a car dashboard.
This code often appears in late winter or early spring, as the high usage during the coldest months quickly uses up the programmed burner hours.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.