Changing your filter once a month is best thing you can do for your Air Conditioning system. All the air in your home goes through this machine and the filter protects you and your machine from air-borne contaminates.
If you have pets in your home you should consider changing your filter more often. Pet dander and Hair/Fur can really clog up an indoor coil.
Keeping the outdoor condenser free of leaves, dirt and and other obstructions is very important. Air needs to pass through your condenser also.
The more air movement around the A/C condenser the better your machine will cool. Save money and and get the most out of your machine.
Yearly maintenance is the key to catching small problems before they become BIG problems.
Properly installed and maintained Heating and Cooling equipment can last and perform for years to come.