E08
Chaffoteaux
Fan Speed / Fan Feedback Fault
E08 displayed, unit may attempt to start but shuts down quickly; often linked to fan or flue 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
Defective fan motor, Faulty fan speed sensor (Hall sensor), Loose fan connector, Obstructed fan impeller
How to Fix / Troubleshooting
Safety: Turn off power and gas before removing the front cover.
- Visual inspection of fan: Locate the combustion fan. Check for signs of overheating, water ingress, or debris in the impeller. Remove any visible obstruction.
- Check wiring: Ensure the fan's electrical connector is fully seated on the PCB and that the cable is not damaged.
- Spin test: With power off, gently spin the fan impeller by hand. It should rotate freely without grinding. If stiff or noisy, the fan bearings may be worn.
- Live test (qualified person only): Restore power and start a demand. Confirm that the fan starts and reaches speed. If it fails to start or stops intermittently, replace the fan assembly.
- PCB check: If a new fan does not resolve E08, the PCB fan control circuit may be defective.
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Repair Difficulty
Hard
4/5
Required Part
Combustion Fan Assembly
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