How do I switch between Fahrenheit and Celsius?

To change the Temperature Scale, open the front door on the thermostat. Setup options for how the thermostat will function are performed using a menu on the display screen.

To Access the Setup Menu  :

1. Move the System Mode temp switch to the OFF position,

2. slide switch has to be in Run, and then

3. hold down the EMER button for approximately 5 seconds until the screen changes.

The menu will always start with item #1 which is Clock format.

4. Press the Next button once until you get to menu item #2.  It will say either “F” or “C” at the top of the display.  Now press either the Up button or Down button to select the temperature scale you desire. Wait 10 seconds and the thermostat will return to normal Run mode.