I've noticed through out the winter months here in Toronto that the A/C light is on all the time when the climate control system is set to Auto. I can manually switch A/C off, but it comes back on once I press Auto again.

I mentioned this to my Infiniti dealer, and he said that this is normal as the climate control system is sensing the humidity during the winter.

Is this normal/true?

 

Yes, it is true that it always comes on when you turn the Auto Climate Control on.

No, I do not believe it is true that the reason it happens is b/c of humidity.

It turns on every single time you turn the Auto climate control on, regardless of the weather outside.

 

If you leave it on auto, the next time you start the car, the a/c will not come on.DOMO

 

That hasn't happened - A/C is on ALL the time in the AUTO setting, even after starting the car the next day.

 

This is typical with all cars I have owned with automatic climate control. They use heat and A/C together to balance the temp, and the A/C helps control humidity.

My Acura TL was exactly the same with one exception. On the Acura you could turn it to recirculate (say, if you were passing a dairy farm or dead skunk) without turning on the A/C. The control logic on the G37 turns on the A/C whenever you push the recirculate button. The A/C does not go off again when you turn recirculate off, you have to hit the button.

The G37 system does work automatically even after you turn off the A/C. As long as it is cool enough that it can keep the temp setting using outside air.

Greg

 

Just started the car...auto was already selected from yesterday with the A/C turned off yesterday. The A/C DID NOT come on. I repeat, the A/C did not come on. Not sure why you have a problem. It DOES come on when I first select auto but as long as I shut off the ac, and leave it in auto, ac does not come on. Try it!

Good luck