1. Change the air filter The simplest thing you can do is one of the most important. Every 30 to 90 days, remove the air filter from your air conditioner and put in a new one. Done.

Here's how. 1. Change the air filter The simplest thing you can do is one of the most important. Every 30 to 90 days, remove the air filter from your air conditioner and put in a new one. Done.

When it's time to put away your air conditioner for the year, don't forget to drain the tank and clean the filter. After that, you should also run the unit in fan mode for 30 minutes to an hour to ...