2010 G37: Air from the air conditioner gets hot when stopped in traffic about 20% of the time. The fan continues to blow but the air changes temperature drastically when stopped at a stoplight. It seems like the compressor is shutting off. I can put the car in neutral to raise the RPM and the air cools back down. This is happening in the (Houston) winter as well. The air gets damp. I took the car to the dealer but I could not recreate the problem at that time and they could not find anything. The service writer was really trying to make this operator error and suggested I turn the temperature down to 65 degrees. That does not help the problem and makes the car freezing (duh) once I start moving. I asked him to check the belts, Freon level, compressor and alternator output at low RPM but I am not confident that he really did. Anyone else having this issue?

 

Put heat shield wrap around the hard A/C lines and see if that helps. A lot of RX-8 guys do that and it improves the efficiency of the system. There was definitely a difference between our old RX-8 without the wrap and our friend who did have the wrap.

That may help, but your problem still seems a bit more serious.

 

^ thos are good tips but not necessary on a stock 2010 model car. IT should blow cool air regardless since mine does and its an 07.

You have 2010 so you should just take it in to the dealership and they should be able to fix it under warranty for free without much fuss. Im guessing its the compressor.

 

Thanks. I did that but will try a different dealer. The problem is only intermittent so hard to recreate for them.