ecobbman

It's possible you got low on freon and sucked some air and moisture into the system. Any moisture can freeze in the expansion valve and cause this symptom. If you can turn the heater on for a while and then have the AC come back, it is a good indicator of this situation. (Iknow this is a tough thing to do on a hot trip) If you are low on freon you might consider replacing your dryer/receiver, having the moisture pumped out with a long vacuum and then recharged with freon.