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It is getting voltage; I checked with a multimeter. When I apply electricity to the connectors on the compressor, the clutch moves in, like it’s supposed to. There is freon in the system. It won’t take in any more, in fact. But the AC is still blowing hot. I’m not 100% sure why. I checked all fuses I could find and they’re all good. Regrettably, I didn’t notice if the clutch engages when the compressor is running. My thinking was a bad compressor, but I’m not sure if that’s necessarily the issue. Any ideas?
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There is freon in the system. It won’t take in any more, in fact.
That’s not a good thing.
Have you hooked a set of manifold gauges to the system to see exactly what it is doing?
If you do not have the experience on automotive AC systems, you should consider taking it to a professional.
You may have issue(s) also with the controls that work the blend doors or the function of the blend doors themselves.The low side is reading around 80 PSI. The high side is only slightly higher, maybe around 85 or thereabouts.
That tells you that you have a charge in the system. What you need to do is start the car with the gauges connected. Turn on the A/C and watch the low side and high side gauge. with the car running about 1,200 rpm the low side should run down from around 40 psig to about 28 psig. This is with the compressor running. The high side should be around 225 psig – 300 psig with the compressor running.
Before I would connect gauge, I suggest you verify the compressor clutch is engaging and the compressor running. Also, if you have a cabin air filter, be sure it has been changed and is clean. I have diagnosed, literally, a dozen HVAC problems with dirty cabin filters.
Typically it’s something simple. Look for the low hanging fruit and check the easy parts first.
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