A/C cooling performance and air circulation

ABDULRAHMAN ZEYAD

MEMBER
2012 CHRYSLER 300
3.6L
6 CYL
2WD
AUTOMATIC
50,000 MILES

Hi,

I have the car listed above (C model), RWD l with 8-speed automatic transmission.
The A/C is not cooling properly in idle. It becomes less cooling until I feel it is not cooling anymore. It does not happen all the way under the same bad weather conditions and that's why I am confused. I need to know at which temperature should the cooling fan start the high speed and should it work continuously at high speed when the A/C is on. If not, how should it work with A/C on?

The second concern is the air re-circulation system. If the A/C is not in Auto mode and I am keeping the air re-circulation on to prevent external fresh air from entering my car. Is it possible that the car will open the door and override to get air from outside? Sometimes I can hear the movement of the door behind the glove box and I get bad smells from outside. Is it a problem from programming? If I decided to cancel this system by disconnecting the power from the actuators, is it going to have any problem with the system?

Regards,
Abdulrahman

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,336 POSTS

Welcome to 2CarPros.

The idea that the AC doesn't stay cold when the vehicle is stopped could be a few things. First, you have to understand that engine RPM's drop at idle. Thus, the compressor isn't turning as fast. Next, if the system is a little low on Freon, it will cause this too. Here are a few links to help with Freon

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

Here is a link that shows how to vacuum and recharge the system:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

The right way to do it is to check what both the high and low pressures. That, based on outside temp, can really answer a lot.

As far as the re-circulation door, no, it won't automatically open.

Let me know if you have other questions.

Take care,
Joe