BoilerFaultCodesWorcester Bosch F7328 Fault Code
The Worcester Bosch F7328 fault code means: your boiler has experienced a brief interruption to its electrical power supply and needs to be restarted.. It appears on 1 Worcester Bosch model in our database.
Technical description: A brief power failure has occurred
What causes the Worcester Bosch F7328 fault?
This fault occurs when the boiler detects a momentary break or instability in the mains electricity reaching its control board. It is typically triggered by a local power cut, a tripped circuit breaker, or even flicking the boiler’s isolation switch off and on too quickly. The system stops as a safety precaution to ensure the electronics can reboot correctly.
This code is slightly more frequent during stormy weather or winter months when high winds and ice can cause intermittent fluctuations or 'brownouts' in the local power grid.
DIY fix possible
Press the Reset button on the boiler control panelCheck if there was a recent power cut or if a fuse has tripped in your homeEnsure the boiler's isolation switch is fully in the ON position
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Gas Safe Register →Worcester Bosch models that show the F7328 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch F7328 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