Tuesday, May 12, 2015
Air Conditioning compressor recharged and now again
My 1998 S10 had the compressor replaced about 6 years ago and I had it evacuated and charged by a licensed professional. This year, now that the heat has arrived, it seems to have much less cooling capacity than it did last year. Rather than completely evacuate the system and add the correct total amount of refrigerant, is there a way to just "top it up" instead of removing all of it and starting over? I have a R-134 gauge set and a vacuum compressor for evacuating the system if I need to do that. But can I add, say 1 or 2 oz. of refrigerant at a time and see if the A/C seems to be cold enough, or can I go by high side pressure and add a bit at a time, waiting for the pressure to stabilize, until I reach a certain pressure? I would guess that the ambient temperature affects the pressures I would be reading with the gauge set since the aftermarket kits have an adjustment for that on the simple gauge they use on the low side. If the aftermarket kit is the best approach, I have the hose from one of those that I used to use before I bought the gauge set and vacuum compressor to do a complete job on another vehicle of mine a year ago.