The problem is that the condenser is freezing up (you where right), but what is causing it is that the evaporater, and condenser are never cylcing on and off....they are always on, and this is being caused, we believe, by a faulty temperature control rheostat. The one in my coach has two wires, plus a thermocoupler which goes to the condenser. Even in the "off" position it is still on. Trying to locate this ancient rheostat right now. Below is a picture of my primitive A/C controls....2 knobs...one for A/C temp, and one for A/C fan....will keep you posted.
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