I'm certainly no expert, but I'd be inclined to wait until I could put some gauges on it, or even pay someone a few bucks to reliably tell me what kind of pressure the system's seeing. My recollection is that with R-12 you need to add enough to eliminate the bubbles.
joe On 7/4/05, Dave M. <[EMAIL PROTECTED]> wrote: > Hi all, > > My friend has a W124 with no A/C. I pressed the schrader valve and > there is still some pressure in the system, so it's not empty. I > shorted the low pressure switch and the compressor runs, and there are > bubbles (or something) visible in the sight glass. I did not have my > manifold gauges with me to test pressures. I assume the system is low > on R-12 at the moment. I hate to feed it precious R-12 just to have it > leak out. I don't have a vacuum pump, so I really don't want to open > the system. Is there anything I can feed in that will be compatible > with R-12 (and cheap1), or am I stuck either taking the gamble (add > R-12) or having to discharge, vacuum, and re-fill with a mineral-oil > compatible replacement like Duracool, AutoFrost, or good 'ol R-12? > He's on a tight (read: zero) budget but sure would like some cool air > if possible. Suggestions welcome...
