I had a spring checkup and was told all was well. That night the air conditioner kept running and the temperature never dropped. I called and the technician that checked the day before said that I need a new compressor (which didn't pay to get on an older unit). So I should replace the whole thing. I decided to get a second opinion. They told me there was NOTHING wrong with my unit and the reason the temperature wasn't dropping was because they tripped the circuit breaker. Before I wrote this review I made sure it would continue to work properly. It's a few weeks later and I have had no problems. AHR also gave me a list of items when they originally checked the units that might need replacing some time in the near future, The second company said there were a few items on the list that I don't even have and one item I was told was missing that wasn't. CROOKS