IN - Purchased 10 year old home. Upon moving in we noted that the AC was not working. AC repair man said although fan worked - compressor/unit was dead and needed to be replaced @ cost of $4000. Repair man noted that unit had been dead for at least a couple of months. We had a home inspection in March when offer was accepted, however couldn't test the AC because of the cold temp. Is there any legal basis to go after the sellers?