Customer said it was working great and then it suddenly stopped cooling completely. I checked outside first to see if the capacitor was bad. I was not getting 24v outside. I proceeded to go inside and find that the float switch was tripped due to a clog. The drain goes under the slab. I blew the drain out with nitrogen and flushed with hot water then followed it with a little bit of drain treatment. Drain is operational. I had a slick substance in the float switch, but I think it was just a slime residue. System is cooling properly.