I have a Lenex unit and the drain has been leaking for a few days now and i cant figure out why.....I took the hose off the "T" and stuck a metal rod down there to see it anything was blocking it up and then after that i poored bleach down there to see if that would work but no luck....And it looks like the water is driping off the evaporator or somewhere in there cause there is a puddle on the furance...