I have a 3 unit Rheem heat pump system for our house we moved into in December of 2006. One unit services the main floor of the house, which is about 2500 sf. I noticed the air stopped working - heat pump, circulating fan all ran, but it did not cool. I called the people who installed it, and they billed me for essentially shutting everything down and restarting it, and admitted they did not know what the problem was.
Does anyone have any suggestions?