C7
Worcester Bosch
Fan Not Running / No Fan Feedback Signal
Boiler displays C7 and will not start, often indicating no fan feedback.
Advertisements
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.
Advertisements
Possible Causes
Open-circuit fan, Disconnected fan plug, Faulty fan Hall sensor, PCB output failure
How to Fix / Troubleshooting
Safety first: Turn off power before accessing internal wiring.
- Visual wiring check: Inspect the fan connector on the PCB and at the fan for secure connection and no signs of burning.
- Engineer diagnosis: A technician should test for supply voltage at the fan, check continuity of the fan windings, and verify the feedback signal. Replace the fan or PCB as indicated by tests.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Combustion Fan Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements