The tech comes out and clears the line and the unit works well for another two months and then the problem occurs again.
This last time, the tech asked where the unit drained to. After much searching, it was determined that the drain to the unit is outside buried underneath of our concrete patio.
The tech said that if that this problems keeps on occuring the drainage line would have to be redirected. This would mean a lot of tearing up of floors and carpeting etc. My question is is there another alternative? How can I prevent this line from constantly backing up? Do I need to redirect the drainage line or can I do something to prevent this?