So I replaced the manifold hose assembly, new drier, converted to 134 and pulled vacuum for 1 hour before charging. AC blow great, super cold. Once you are driving it blows ice cubes, literally. So after about 15-20 minutes the evaporator is basically freezing up. You will start getting fog blowing out the vents followed by snow, then loss of airflow. If I put it in ec mode for a few minutes it thaws out then is fine again. This issue seems to be the compressor is constantly running, it does not cycle off and on. The PBU that was in the car had a programa rebuilt sticker and the snow flake button did not turn the compressor on at all but the top button did that is supposed to be for dehumify and runs compressor constantly. The snow flake button is supposed to be normal mode that cycles compressor. I swapped in a different PBU and the compressor kicks on with the snow flake button but stays running all the time. Could this be something in the PBu? Or the kooks relay? Or maybe a sensor? These 201 systems are a little different from other systems MB used.
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