[dt_list style=”2″ dividers=”true”] [dt_list_item image=””]Is your home’s thermostat set in the “heat” position? Also, let’s make sure the thermostat setting is set to at least 3 degrees above the temperature in your home to ensure there is a call for heating to the system.[/dt_list_item] [dt_list_item image=””]Check your system’s air filters to make sure they...