I noticed water pooling up in my secondary drain below my ac unit in attic. So I thought the drainage pipe to the outside might be clogged, so I took a shop vac to see I it was clogged and it wasent. So I thought maybe it was the drain inside the unit. Only I can't access it. But then I noticed a strong flow of cool air coming out of the access hole to the drain pipe, and from another hole on the unit itself. Please tell me what is going on here. There doesn't seem to be anything blocking air ducts, or vents, dampers are fully opened and air is flowing into the house. This can't be normal. Any help?Thanks