fmpotter

UPDATE: 91 LS400 Well I just spoke with a mechanic regarding my LS. I took it in and paid $40 for a thorough diagnostic A/C inspection and the results were that I showed leakage around my compressor and Uh Oh-ring. He recommended a replacement compressor, O-ring, low pressure switch, receiver-dryer, and to gamble NOT replacing the expansion valve. Any suggestions before I decide to take on the challenge of installing the compressor and dryer unit myself? I have never done this and am also afraid to try to install the O-ring and don't know about the low pressure switch. I'm somewhat mechanically inclined it's just that I don't know exactly which tools are required to maximize effectiveness and minimize the time I'll invest in this job. Thanks in advance.

Thanks RFeldes! I suspect the compressor is shot. You brought up another couple of questions... What are the percentages that the condensor is compromised? What are the percentages that the expansion valve may also need to be replaced?

So what's the best way to determine whether it's the clutch that's defective or the compressor? My compressor "had" been making a whining sound when you manually turn on the A/C. It sounded as if the bearings were grinding. Finally, it stopped cooling. I know it's leaking coolant because it will not hold a charge. I can't see a code on my internal LCD display because that is on the blink as well and there is no intermittent blinking A/C light. That stopped a while ago. 91 LS400.