F04
Proline
Convection Fan Motor or Fan Element Failure
Fan oven mode not working, no hot air circulation, F04 displayed when selecting fan-assisted cooking
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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
Open convection (fan) heating element, Seized convection fan motor, Faulty fan relay on control PCB, Burnt wiring to fan assembly
How to Fix / Troubleshooting
Safety first: Disconnect mains power and wait for the oven to cool completely.
- Check fan operation: Select fan mode with the oven cold and listen. If the fan does not spin at all (and you later restore power for this test), suspect the fan motor or its supply. Do not run for more than a few seconds if there is a fault.
- Access fan assembly: Remove the oven rear inner panel (inside the cavity) to expose the fan blade and fan element. Inspect for heavy grease buildup or obstructions preventing rotation.
- Spin test: With power off, try to spin the fan blade by hand. It should rotate freely. If stiff or seized, replace the convection fan motor.
- Test fan element: Disconnect the fan element terminals and measure resistance. Typical values are 20–60 Ω. If open circuit, replace the fan element.
- Inspect wiring: Check for burnt or loose connectors at the fan motor and element. Repair or replace damaged wiring.
- Control PCB relay: If motor and element test good but F04 persists, the fan relay on the control PCB may have failed. Replace the main control PCB if relay contacts are burnt or the relay does not energize.
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Repair Difficulty
Hard
4/5
Required Part
Convection Fan Motor
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