In late 2007 we purchased three RTAA125 chillers. Motors have been dropping out like crazzy. After doing some research I was told that Trane knew they were defected but did not want to do anything. Something about how the specs changed when they changed fan blades. They have changed the motors up I'm told on the new ones by putting in a metal sleave around the bearing. At current rate I will spend about $ 18,000.00 to change out motors. I've asked Trane and AO Smith with just some help on this. AO Smith has told me they are out of warranty. Is this the way they work. Pretend there is no problem then say they are out of warranty? Consumers deserve the right to have quality product I think. What say you?