Engine Size: 3.1L
Refrigerant Type: R134a
Ambient Temp: 82
Pressure Low: ~120
Pressure High: ~120
Country of Origin: United States
Been here a few years ago with a Mercury Topaz I had problems with. Right after I fixed it I sold it and bought the car I have now, that was in 2003. I have not had a problem with the AC till recently. Three or four months ago I noticed that it was not cooling well. It has gotten progressively worse till now. It blows out some cool air, but not nearly enough to cool down.
I just broke out the gauges I bought back then and hooked them up. Basically it looks like I have the same pressure on both sides. After running it for a few minutes the High and Low side pressure was around 120. I just checked it after sitting for about 30 minutes and they are both about 100.
What do you think is wrong with it?
Is the clutch even engaged?
It would appear so. With it set on max I can turn it on and you can hear it click and when I turn it of you can hear it click again. When I turn it on to vent, if I turn the AC off you can hear it click and then the temps get warm. When I turn it back on you can again hear it click and then the air comes out cooler.
V5 compressor. Could be a dead control valve. If it were in our shop. I would check for obvious leaks - reclaim - evacuate - recharge to the OEM specifications. If I have issues with it not charging correctly. I would swap out the control valve or compressor.
Sorry to take so long to get back, busy week with school and work.
I guess it will be awhile before I can get back to it, I don't have a vacuum pump or UV detector kit. I would have to get them first. I certainly couldn't afford to take it to shop.
Can a vacuum be pulled on the system as it stands now without removing the coolant?
No need to remove the coolant (antifreeze) but you will have to remove any and all refrigerant in the a/c system to pull a proper vacuum.....
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
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