AC Drain From Overflow instead of Main, Even with No Pipes Connected
So this morning I opened up the evaporator compartment and sprayed coil cleaner around. This evening, my patio is dry (where the overflow drain comes out) - I don't have water coming out anymore. It seems that the coils were either not draining properly or the airflow was misdirected by the dirty coils enough to disrupt the normal draining. Thanks @Tester101 for your efforts to help me.