I've had my 2013 g37 for a couple months and I notice something that my previous G35 didn't do and I'm not sure what could be wrong. The AC take a couple minutes before it blows cold and sometimes it won't blow cold on recirculation mode. The dealership filled the freon and assured me nothing was wrong. I don't think that could be right though. When I get in the car on a hot day I want the AC to cool the car down quickly, not wait until I drive for a couple minutes. Anyone else have this issue? It sucks to not be able to turn it on recirculation mode sometimes. But it sucks even more to have to cool the car down by driving with the windows down until the fresh air mode starts to blow cold air. The dealership tried to tell me that that's how the car is supposed to do and that the compressor works harder once I start driving and have the rpms raised and heated up the engine...but that just doesn't make any since to me. It's been doing this since the day I drove it off the lot and I had them make sure the freon was filled again before I purchased it so I know it's not because of low freon. I appreciate any thoughts or input.

 

Sounds like ac relay might be going out or ambient temp hose inside near your knee on lower dash might be loose or dirty, it has a mesh screen type cutout cover

 

I read about that when searching through the forum earlier. So should I blow on it to try to clean it? Or does.it require removal to clean or fix? So when it reads heat it makes the AC colder and when it reads cooler temps it heats the AC up? And what your saying is it's reading cold and warming up the air when it should be reading hot and keeping the AC cold?

 

Make sure hose is secured to the vent grate slotted piece