Now autumn's arrived and the leaves are falling from the trees, you might notice that your ventilation fan starts to make humming / vibrating sounds when it's on 3 or 4. This is because leaves get sucked into the inlet of the fan and get stuck in the fan blades. Here's how to get them out. You will need a Torx screwdriver (3mm, I think) and about 10 minutes to do this job:
First, turn on the fan, and set it to re-circ. Once the re-circ's come on and the fan starts to blow harder, turn off the ignition (just to be on the safe side!) Doing this will open a flap on the back of the fan that lets the air from inside the car back into the fan inlet - more on this later:
Sorry for the rubbish cameraphone pics - they should be good enough to do this, though...
Next, open the passenger door and the glove compartment lid, and push off the D-shaped bit of trim down the side of the dash:
Close the glove compartment lid again, then undo the two screws underneath the dash, just behind where the glove compartment lid hinges down:
Now, use your knee or foot to support the glove compartment unit, open the glove compartment (again!) and undo the three screws along the top edge:
The glove compartment unit will now drop down, and you will be able to see the fan housing in front of you. If you reach right round the back, you can get your fingers inside and pull out any leaves stuck in the fan blades. Turn the blades round a couple of times to make sure you've got everything:
Re-assembly is virtually the reverse of dis-assembly, as they say. You will need to be careful of the passenger footwell air outlet (marked by the dotted line), and you may find it easiest to do it with the passenger door open to give you a bit more room to manoeuvre:
That's it! Enjoy your quiet(er) fan!
(Printer-friendly pdf version attached below...)
fabia_noisy_fan.pdf