Air Tech LLC recommends scheduling a professional HVAC Preventative Maintenance,  at list two times a year. 

How do we do that? First-able our technicians  will Perform  a visual Inspection  of your  HVAC System, if is necessary they will  clean a Clutter around the Indoor HVAC Unit and check  and regulate the home temperature. 

Make sure that the filters are clean or you should change one month and control the batteries of your Thermostat.