We have used One Hour Heating and Air - Salt Lake City a few times before. The most recent project they did for us was fixed a sensor. I'm not sure what kind it was. But it makes the light turn on and off. It just wasn't working. Now it's working fine. I will continue using their service because they do their own maintenance. They put it themselves. I have no problems with the service. If someone were interested in them, I would say they do a good job. For sure I would use them again. Making appointments was also easy to do. They were professional and friendly. I would recommend One Hour Heating and Air - Salt Lake City to my family and friends.