A/C doesn't work. vacuum on low die. TXV expansion valve?
Posted: Tue Apr 24, 2012 9:22 am
When I got the car, the system was completely out of refrigerant. I was able to get it to accept the entire rated amount of CFC 12 after pulling a vacuum. When I pulled a vacuum, it held vacuum, so I don't think there is a massive leak.
It doesn't cool at all and after a few minutes, it will make clanging noise. I noticed that when I turn it on, it will immediately pull low side below 0psi into vacuum.
Since I know the system is properly charged, I'm guessing the TXV is stuck shut. The clattering must be from high side going through the roof. I need to check both sides, but currently, I don't have manifold gauge fittings for 3/16" high side port, so I can't do it.
Should I just replace the TXV, or do I need to replace the compressor too? I don't want to throw money at it, but then, compressor is expensive and so is R12.
It doesn't cool at all and after a few minutes, it will make clanging noise. I noticed that when I turn it on, it will immediately pull low side below 0psi into vacuum.
Since I know the system is properly charged, I'm guessing the TXV is stuck shut. The clattering must be from high side going through the roof. I need to check both sides, but currently, I don't have manifold gauge fittings for 3/16" high side port, so I can't do it.
Should I just replace the TXV, or do I need to replace the compressor too? I don't want to throw money at it, but then, compressor is expensive and so is R12.