A11
Ferroli
Fan / Airflow Control Fault
Boiler displays A11; may be associated with incorrect fan speed feedback or air pressure issues.
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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
Faulty fan motor, Blocked fan venturi, Faulty fan speed sensor or Hall sensor, PCB fan control fault
How to Fix / Troubleshooting
Safety first: Turn off power and gas. Fan and flue components are part of the combustion circuit and must be serviced by a qualified engineer.
- User checks: Listen for the fan starting when there is a demand for heat. No fan noise suggests a fan or control issue.
- Engineer checks:
- Verify supply voltage to the fan and check for correct speed feedback.
- Inspect and clean the fan and venturi for debris.
- Replace the fan assembly if seized or not reaching required speed.
- Test PCB outputs and replace PCB if fan is good but not driven correctly.
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Repair Difficulty
Professional Required
5/5
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