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A/C is not blowing as cold as I think it should?

Tiny
CWISNOWSKI
  • MEMBER
  • 2015 NISSAN ALTIMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 26,000 MILES
The compressor is engaging. I have vacuumed the system and filled it. I will include a photo of my current gauge reading at outside temperature of 100. The tubing is not getting cold under the hood like I believe it is supposed to. Using a temperature probe on the 4 vents inside the car. From left to right after cooling on max AC for at least 30 minutes I have a temperature of 75, 74, 64, and 65. Any advice is appreciated. Also, not sure if it's related but there is a temporary whining sound that comes from under the hood for a second while car is running.
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Thursday, June 29th, 2023 AT 6:06 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,967 POSTS
I don't see the photo. The vent temperatures are too high which can be caused by a compressor going out. at 100 degrees the high side should be about 260 psi and the low side about 45 PSI.

Please check out this guide which should help:

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

This video as well:

https://youtu.be/4EqdrBVb0sY

Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/replace-air-conditioner-compressor

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Friday, June 30th, 2023 AT 11:05 AM
Tiny
CWISNOWSKI
  • MEMBER
  • 4 POSTS
I have reloaded the photo of the gauges after charging the system with the proper amount of freon. So based on the previous answer. It could be just that the compressor itself is failing. Also, is there any concern with the 2 vents on the left being about 10 degrees higher than the 2 vents on the right side?
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Friday, June 30th, 2023 AT 12:54 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,967 POSTS
If the engine is running and the system if full the compressor is bad. Thanks for the image.
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Saturday, July 1st, 2023 AT 11:27 AM
Tiny
CWISNOWSKI
  • MEMBER
  • 4 POSTS
Okay and is there any concern about the difference in temperature from the left side of the car to the right side? The temperature out of the vents?
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Saturday, July 1st, 2023 AT 12:22 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,967 POSTS
Not at the moment, you may have a blend door actuator that is not working correctly but I would do the compressor first.
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Monday, July 3rd, 2023 AT 11:13 AM
Tiny
CWISNOWSKI
  • MEMBER
  • 4 POSTS
I changed all A/C components and it seems to be resolved at this time.
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Monday, July 24th, 2023 AT 2:00 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,967 POSTS
Thanks for letting us know, we are here to help, please use 2CarPros anytime.
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Tuesday, July 25th, 2023 AT 6:36 PM

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