Dan, called and was here at 10:30, when his scheduled time was between 12-2. He got straight to work checking my furnace, and concluded that the furnace was fine, the problem appeared to be with my thermostat. He gave me the option of going out to purchase my own thermostat rether than saying I needed to buy his. I thought that was nice! Have absolutely no complaints, thanks for the quick resonse when I was a new customer. I'm a customer for life!