text:  How do you maintain your AC system? What can you do? What can you do to maintain your AC system right now? You say, well, everything's running fine, and I sure don't want this thing dying on me this next weekend when it's 100 degrees for multiple days in a row. What can I do? He says, your AC system is greatly affected by a dirty filter. And the guys at the Air Filter Superstore, another one of our sponsors, they...