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Re: 1989 Air conditioning Question
A depleted system needs to be serviced properly.
The leak needs to be repaired, or else all the new refrigerant will leak out.
Also, the system needs to be evacuated (all the air and moisture sucked out) before the new refrigerant goes in, or else the system will not work properly.
Finally, old R-12 systems need to be converted to R-134. I believe the lubricant for the compressor (which is mixed with the refrigerant) is different........ and finally, you may find the R-134 hose will not work on the R-12 system valve.
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