BoilerFaultCodesWorcester Bosch PC Fault Code
The Worcester Bosch PC fault code means: your boiler is working normally, but it is displaying a reminder that its annual service is now due because the programmed operating hours have been reached.. It appears on 1 Worcester Bosch model in our database.
Technical 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 the Worcester Bosch PC 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.
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Gas Safe Register →Worcester Bosch models that show the PC fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch PC fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026