I have a 2006 G35 sedan and lately I have been hearing a slushing noise behind the dash. I'm pretty sure its coming from the A/C not draining correctly. I found the drain tube on the passenger side and blew air into the hose; it didn't seem clogged. Has anyone come across a similar issue? I really do not want to take my dash apart.

Thanks for anything you can offer.

 

Your A/C system will make that type of noise when your freon level is low. Check for visible leaks from your A/C system. The most common places for it to leak out is from your A/C condensor and your A/C clutch seal on the compressor itself. Sonner or later your vents will only blow out only warm air.