C7
Worcester Bosch
Fan Not Running / Fan Feedback Fault
Boiler displays C7, fan not detected or not running.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed fan motor, Loose fan connector, Faulty PCB fan driver, Seized fan bearings
How to Fix / Troubleshooting
Safety first: Isolate electrical power. Do not attempt to spin the fan with power applied.
- Listen for fan: On a heat demand, if there is no fan noise at all, the fan may have failed.
- Reset once: Try a single reset to rule out a transient fault.
- Engineer tasks: A Gas Safe engineer should check supply voltage to the fan, inspect the connector, test fan resistance, and replace the fan or PCB as needed.
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Repair Difficulty
Professional Required
5/5
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