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#1: I'm wondering if an overcharged A/C system would ever have low suction pressure. Since the superheat is low due to the evaporator being flooded with refrigerant, wouldn't this mean less boiling off and hence lower pressure? Or is it just the volume of liquid that leads to the high pressure.
#2: Whats the difference between a system that is low on refrigerant and has a warm evaporator and a system that is low on refrigerant and has a frozen evaporator? Is it how much refrigerant is missing? Would an overcharged system ever lead to a frozen evaporator?