Ac went out yesterday.......we have two units, one upstairs and one downstairs and the one upstairs gave up I guess. Just had a guy come out and said the compressor is bad and something about the coils are rusted or something like that. He quoted $2600 to replace everything. Never had to deal with anything like that so I don't know if thats good or bad. I'm in Texas and its like a million degrees down here so it's hard to get another ac man out here to get another estimate. Any tips or opinions?