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Yes, it should drain outside. Is your unit tipped so it slopes into the house rather than to the outside? If it is sloped to the outside the drain hole may be clogged.
First, it would be a good idea to put a level on the case outside to be sure it's sloping away from the house. While you're out there take a wire coat hanger and poke it into any open holes on the bottom of the case. Don't insert the coat hanger more than an inch.
Level seem ok as in side of the unit at the house is the high side?
Then the water should drain out to the outside. If there are no holes on the bottom the condensate will drain out at the bottom corner of the case. Your unit will probably need to be removed from the case to see what the problem is if you don't see anything blocking the corners
I have to leave for a while. If you don't have any more questions I'd appreciate a favorable rating. If you do have more questions I'm going to open this backup to my colleagues so one of them can help.
Ok, I'm back. Your next step would be to remove the unit from the case.
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