Air Conditioning Slowly depleting?

DSCHWINDT

MEMBER
2006 BUICK LUCERNE
3.8L
6 CYL
2WD
AUTOMATIC
120,000 MILES

My A/C still works but the temperature of the air is slowly increasing. I assumed it needed more refrigerant, so I was going to recharge it. But when I attached my low pressure gauge with screw-on r143a, the gauge showed the pressure to be in the yellow. Apparently, this means there is a problem with my A/C, and it doesn't need to be recharged. Since the air was slowly getting warmer it seemed like a recharge issue, but now I'm at a loss. What are some potential fixes?

Thursday, July 3rd, 2025 AT 8:59 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
52,185 POSTS

Sure, can I ask when you run the engine and turn the A/C system on can you hear the radiator cooling fans come on? Also, those can kits do not tell us much, we need to connect an A/C gauge set which you can get from Amazon for about $37.00.

https://amzn.to/4exX08S

And then watch this video:

https://www.youtube.com/watch?v=4EqdrBVb0sY

Also, can you tell if the compressor is clicking in? Please go over this video and get back to us.

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Saturday, July 5th, 2025 AT 12:36 PM