Why does my dico keep going back to factory settings

You probably are not properly saving your settings.

How to Change the Program on a Dico Thermostat | eHow (http://www.ehow.com/how_7937936_change-program-dico-thermostat.html)


Push the "UP" and "DOWN" buttons to set the temperature that you want your house to maintain overnight. Push "PRGM" or "MODE" to save your setting.

Its possible you are manually programming your thermostat, and when the program is over, it reverts to default manufacturers settings. Do you have a manual?