I am getting these kind of noise https://youtu.be/QhmK7oDX1tE

Any idea what's wrong?

Car details Year : 2010 Model : Lexus hs250h

Its happening when I switch AC/Fan on and it last for 30 sec and then goes away. of course it also go away if I switch off the AC/Fan

  • What year? Is there anything else you can add? When this occurs, etc. cheers! – DucatiKiller May 5 '16 at 3:18
  • added more more details – SteveJ May 5 '16 at 4:03

Sounds like a plenum (ventilation duct) fan bearing is slowly going bad based on the sound from underneath and behind the glove box.

  • Definitely the fan. Its either a bearing issue or its a wear issue at the motor's commutator brush interface. You could remove fan from behind the glove box, add a few drops of oil to both sides of the motor's bearings and retest, or just purchase and install a new fan motor. Obviously oil won't help a commutator harmonic. As repair jobs go, its pretty easy. – zipzit May 5 '16 at 5:37

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