Hi,

I have a 2010 G37. When idle (stop at red light), the A/C sometimes is warm & not cold. This happens sometimes & sometimes it is cold. Lately, it is more sometimes not cold and/or warm.

when the car is driving, it is cold at all times only when idle at red light.

is there something I need to prepare for or maintenance that I should do to prevent the A/C from stop working at all times?

thanks.