PeachParts Mercedes-Benz Forum - View Single Post - How do I know what refrigerant is in my system?

JHZR2 · #16 07-01-2009, 09:47 AM

Got it, thanks!

Makes sense... Ill have it evacuated and repressurized to 30-40psi, I guess?

So moisture + R12 oil = acid (potentially). But what is the consequence of R134a + R12 oil? Or, R134a+R12+R12oil?

I assume that since HC is miscible in the R12 mineral oil, that if that was used to "top up", that wouldn't be a big deal.

Also, say the R12 in there IS contaminated with HC or 134a, what is the correct procedure to collect it? It seems that the shops recover and perhaps resell clean refrigerant that they obtain. However, if it is contaminated, Im sure they still need to collect it, not just vent it to the atmosphere. Do they typically have a dedicated "catch can" for the refrigerant, or do they do something else?

Thanks!