Today is Sept 14, 2012: I bought the XB14 4 ton heat pump (4twb4049e) and 5 ton air handler (4tee3f66a1000a) 23 months ago. When it was 9 months old the system died….in July…..90 + degrees…..and on a weekend.A circuit board burned out in the air handler. Apparently the 10 year warranty doesn't cover "after hours" or weekends.It cost me $300 and change to have it repaired. Corresponded with Trane in Texas asking why I had to pay to have this repaired when its only 9 months old and I spent thousands and thousands of dollars for the Trane system and why don't they stand by the Trane name. It was like talking to a politician. Last month the system died again …August in Florida,hot-hot-hot…Air handler again. The bearings on the motor burned out..Dealer couldn't get a new motor for 24 hours,(could have if he wanted to but it was after hours). But I learned my lesson from last time, don't bother Trane in Texas and only have problems 8 to 5 Monday to Friday. The point of this complaint is "Why buy a Trane?". The company seems to be resting on the motto "can't stop a Trane". Well you certainly can and with a screeching halt. With the money you spend to buy a Trane you should not have these problems. The testing and quality control seems to be non-existent. I had a tossup between Trane and Carrier and I went with Trane because my old unit was a 20 + year old 4 ton trane heat pump and the Trane guy did a better presentation. Now I'm going to forever wonder if I did the right thing for my family by going with Trane. Right now I think I would have been better off with Carrier. At least I feel better by writing this and maybe give somebody some information to help make an informed decision about the purchase of a ac/heat pump system for the home.