On Saturday, July 19, I’ll be talking about how to maximize your cool while minimizing your AC use on my weekly CFRB Green Tip on Mark Cullen’s Garden Show (AM1010).
For those do-it-yourselfers who want to keep your AC in tip-top shape and thereby ensure its efficiency, here’s a great site, complete with diagrams and step-by-step instructions to walk you through maintenance.

http://www.howstuffworks.com/how-to-maintain-an-air-conditioner.htm