Hvac Fab Making A Flap Flap Flap Noise

[tolum]

Hi;

My HVAC fan seams to make a strange noise, mainly at startup. A kind of ''Flap Flap Flap''. Maybe there is a leaf or vibration isolation foam part in the fan??? My car is a Boxster 2003, 2.7. When looking by the passenger side under dash (after removing the black foam protection) I can see the drain that plug to the evaporator box, but can't see something that looks like a blower. Is there a DIY rule to find and remove the fan to llok to it? If not, where is that fan?

Tks for you help

Thierry

[Loren]

With the fan off - reach in through the pollen filter opening in the front trunk area. Likely either debris or foam.

[lepere]

I had the same problem but my mechanic found it. The flapping came from a blower valve that adjusted the direction of the a/c from either windshield to dash vents. The replacement was pretty cheap but looked like it was a pain to get to - I didn't do it myself so I don't have any DIY suggestions for you.

Good luck.

[tolum]

My flap noise varies with fan speed so that's why I think I may have some loose foam or something else in the blower section. Will try to take it out by the passenger side right foot section.

Thanks for you help.

Theirry

[tolum]

Finally, did found the way to access and remove the blower. Remove the glove box door and the plastic housing (black box). Blower is right behind that box. Remove the fan. Made a try out of the housing, still the flapping noise at low speed. Unplug it and took a look. Bearing at top of the motor looks corroded. Did lube it by spraying a little bit of white grease in the bearing. Turned the fan wheel by hand to help grease to penetrate. Et Voilà! No more noise, fan turn like a new one... YouppI!

Thank you all.