thermostat blank

  1. L

    Thermostat Digital Screen is Blank - Is it the AC Unit or the Furnace? How do I troubleshoot?

    80UHG Series The thermostat runs both the AC unit and the furnace. There is no reading on the digital screen. I used a voltmeter to determine that it is out because no voltage is going to the thermostat. I've researched a bit and found out it may be due to a blown fuse in one of the units. How...
Top