|
If the orifice tube is clogged, the high side will go through the roof, and since the volume of refrigerant on the low side will be decreased, the low side pressure will drop, often into vacuum, instead of rise with more RPMs. Diagnosed it, verified it, and fixed it too many times.
If the condensor isn't shedding the heat (either no air flow, or semi-clogged internal passages) all of the pressures will be higher. More heat = more pressure. If the evaporator side is still trying to pick up heat, and the consor side can't get rid of it, system wide pressures will be higher.
If there is good airflow over the condensor, I'm guessing the valves on the low side of the compressor are shot.
Shoot the condensor with the garden hose, and see if it gets colder inside. When you are moving, the condensor gets more airflow, and it starts cooling again.
|