Best Cleaning And Inspection in Phoenix AZ

Furnace acting erratic doesn't heat then it does. since it was running fine while the tech was here could not give a diagnosis. When he arrived it was heating and seemed to work fine the entire time he was here. It worked fine until maybe 3:00 am when it failed which is what we told tech. So paid for inspection but no solution. Now no heat since 3:00 am and not heating, again.

I called them 10 times. No one respond to my call. And thier voicemail box is also full. I don't know how they are running thier business.