AC pressures

[tollboothwilley]

Since I'm here in Arizona I'm running my AC all the time and its been warming up some when i'm just idling ( the air is what has been warming up).

Seems like low freon. Anybody know the Low/High pressure specs?

[cheapazz]

Usually, not always, the a/c air is warmer when at idle in warm temps because the compressor isn't turning as fast and there is not the needed airflow over the condensor radiator, even with the fans on. When the industry changed to R-134 as the cooling medium, the results were better for the environment but the cooling effect dropped slightly. The effect is most noticeable in hot climates. Other than that I would contact yer freindly local Nissan/Infiniti dealer.

[joe603]

AC systems are designed to take out 20 degrees of heat in the cabin. If it's really hot, and you're not moving (forcing air over the condenser) the AC will not seem as cold. However, if you're moving and it doesn't feel as cold, then there could be a problem with the refrigerant.

[tollboothwilley]

has anybody checked out their pressure levels?

According to the manual, the low pressure side (in 104 degrees temp) should be between 45-54 PSI.

High Pressure should be between 290-360 PSI in the same conditions.

Those were much higher than I anticipated. Normal seems around 30/200.

After adding more freon slowly, I was able to drop the temp at idle from 68 degrees to 48.

Discussed this issue with a few Infiniti mechanics, they said they have common issues with the high pressure side leaking here in AZ.

[Kenrik]

It got to 104 degrees here and my AC evaporator core burst...

I don't think the ACs in the Gs like extreme heat that much.

[tollboothwilley]

117 here... works fine minus the leak i think i have. Must be a pretty small leak that i'll have to repair when i get a chance.

Just will have to fix if i get some time soon...

[BrandAidDesignG35]

sorry to hear of your troubles John, not the car... having to live in heat like that, I'm on the ocean, and it's usually well below 80-90 I use the AC rarely, as the underground parking keeps things cool, but when travelling, or, just hot days, I need AC.

Good luck with the leak!

[tollboothwilley]

For now I'm too busy to get it checked out, but I'm pretty sure I have a leak, most likely in the high pressure side. Its possible there is a little air in my system as well though.