I have a 2011 G37 journey sedan with only 26k original miles. Every time I turn it on after I'm off work when it's really hot the ac is on and when it's warming up it sounds just like a power steering sound but I'm thinking its from the AC? Can that be normal I'm under warranty so should I get it checked out and in the morning it doesn't sound like that and the ac is on. When the car after work I put the ac full blast but tomorrow I will turn it off and see if it still sounds. Any ideas?

 

Record a video so we can hear the noise.

 

I will tomorrow for sure!

 

Here's a link, not too sure if you can hear it but it like growls until it's warm, not for Long tho, maybe a whine sound.