I am having a 3 ton unit replaced by my cousin for a great price $900 for a york guardian. I read some terrible reviews online over at Furnacecompare.com York is rated almost dead last and on the site they have recent customer testominals. They have amana, rudd, rheem, american standard, tempstar, trane, weatherking, carrier, goodman, ducane in that order to name a few and york last. Should I be worried or will I be fine with the York?