Charging Dash A/C
My dash A/C works great although it will lose some R-134A over several months time. I added a can and a half about four months ago (hose with vale and gauge from auto store). I noted at the time that ...
Forum Discussion
riggsp wrote:
After so many times of leaking and adding new refrigerant, air is getting into the system...time to completely discharge, and vacuum all the air out, find and repair the leak, and recharge with the proper amount of refrigerant...air in the system can cause a false pressure reading, too much refrigerant will cause a lack of cooling because the system can't convert the refrigerant from liquid to vapor efficiently.
IF the fill line is purged correctly, NO AIR can get in a system. But, I guess using the shelf systems at Auto part stores(I have professional Gauges/tools) and have never used the shelf type systems, so maybe you cannot purge the fill system on those systems. Doug
