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QUOTE (wozzy @ Jun 18 2010, 07:26 PM) index.php?act=findpost&pid=334298
Anyways, I noticed that when I turn on the heat in my Sonata when the car is cold I hear snapping and popping and cracking noises
coming from the vents. It only lasts for maybe about five minutes and then they go away when the plastics in the vents, oh I don't know, adapt to the temperature? Same thing when the car is hot inside and I turn on the A/C I get the same kinds of noises. Now I'm wondering if this has to do with the materials still being new and after a while these noises will eventually go away or cheap plastics which means it will always be like this. Anyone else notice this?

The reason I ask is because my previous car was a 06 Civic which was bought brand new and I don't recall ever experiencing this. It's not a big deal I'm just curious if anyone else has noticed this also and can share some insight.
I noticed this on the 09 Sonata loaner they gave me while I was waiting for my 2011 Limited to arrive. It sounded like leaves or plastic in the vents. And I thought "I hope the new car doesnt sound like this"...and it doesnt. Its quiet..A little LOUD when its on high, but otherwise quiet.
 
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