Sorry for your problem. I am here to try and assist you.Let me ask you. does the drain tube have a fish tail seal at the end? Jim!!! Thanks for coming to Just Answers.
No just a straight hose
Have you tried to clean posibity of accumulation of debries> Jim!!!
Havee youu owned it for any summers, orr have you just aquire it?
everything has been flushed out good and there is no restictions when the fan is on its like its creating vacume not letting the condensation run out
Ive had it 2years now
didn't use the air much the first year
Is the drain in the lowest part of the heater box?
If the blower fan isn't on the A/C shouldn't be running hence no water will be accumulating.
getting late i'm signing off forr tonight. Jim!!!