Hall's Heating and Air Conditioning was out here most recently to replace a thermostat, probably about a month ago. That went really well, but they were out probably two months before that for kind of the same problem and weren't able to fix it. At the time we were having trouble with the heating and at this point, we have switched over to the AC. So I'm hoping that it was the same problem for both and now the heating is fixed too. As far as their prices are concerned, the annual service charge is a little higher than we've seen elsewhere, but the AC was a good price. They installed it about a year ago. They're always friendly and nice. They've always returned my phone calls.