Re: 1996 tracker A/C question
134A and many other "new" refrigerants are termed AZEOTROPIC BLENDS. This is a blend of a high percentage of an HFC refrigerant (doesn't destroy o-zone), & a HCFC (not as bad for the o-zone as CFC's). Now, in a sealed system the two refrigerants are umm....HAPPY together. BUT, if you have a vapor leak in the system you may loose some or all of one refrigerant before any of the other leaks out. Why? because at a set temperature refigerant X is at a much higher pressure than refrigerant Y. Hope this helps a little. See if you can spot a sightglass on a reciver tank under the hood. Have someone click on the A/C, listen for the compressor to kick in, did it?, did the cond. fan start?, watch the sightglass, look for it to go from "flashing" (some bubbles & some liquid) to a full sightglass of liquid refrigerant. Do this check out then post what you found.