High & low A/C pressure is going to vary greatly depending on ambient temperature and other factors. So there really is not a specific pressure reading for either. Typically low side is between around 25-45psi and high side is 150-300psi. with the higher of the readings at higher temperatures and fully charged.Ward said:I'm looking for the pressures for the low and high side. I've tried searching, but I cant seem to find them anywhere.
That sounds about normal. At 95 degrees outside you won't get much more than 30psi out of the small r134 cans of freon. If it still needs more R134 you will probably have to cool down the condensor by spraying it with water while it is charging to get the low side below 30psi so it will take a little more freon.Ward said:Well, I topped it off, it took about half a can. At idle, I was getting about 30psi on the low side, and about 210 on the high. According to my OTIS display, it was 95 degrees outside. I found a rule-of-thumb formula that said the high side for R134 should be 2.2 to 2.5 times the ambient temp in farenheit, so 210 is pretty close. It seems to be blowing colder now, but I wont be sure until tomorrow, when I drive in the mid-day heat.