F04
Ferroli
Fan Speed / Tachometer Fault
F04 displayed, fan may run but ignition does not proceed.
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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 tachometer sensor, Fan running too slowly, Blocked air path, PCB fan control fault
How to Fix / Troubleshooting
Safety: Disconnect power before touching the fan or flue components.
- 1. Inspect fan: Check for debris in the fan housing. Spin the fan by hand (with power off); it should rotate freely.
- 2. Check flue and air intake: Ensure there are no obstructions causing excessive resistance.
- 3. Wiring check: Inspect the multi-pin fan connector and tachometer wires. Reseat connectors.
- 4. Replace fan: If the fan is noisy, stiff, or tachometer signal is missing, a technician should replace the complete fan assembly.
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Repair Difficulty
Hard
4/5
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