Ac on 99 crown vic blows cold fhen hot. Pressure in ac line is either to much
or not enough. No leaks. Cant get happy medium.
Has there been any recent work on the system?
Yes I added oil and coolent. Well tride to add coolen but built up to much presser then. Now someone has bipassed heater core allso
It sounds like too much oil, do you know how much you put in? Bypassing a heater core will not cause any A/C pressure problems. Just a cold, frozen or damp car in the winter.
4oz. Oil. Also freezes over. Cant get right pressure. To high but shut car off for min start up and pressure to low
May have a clogged orfice tube filter this filter is inside of the high side of A.C system ( the small line ) you will need a line disconnect tool to separate line and filter is inside.
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