Which is better, keep my air conditioners fan in the ON position or the AUTO position?
This is a decision that should be made by personal comfort preference. You may have rooms in your home that are a little warmer part of the time and cooler in others. This may be due to the season, (the position of our daily Yuma sun) and the time of day. By turning the fan to the ON position the air in the home is constantly mixed and will provide a more even temperature throughout the home. In addition to a more even temperature the air you breathe is passed through your filters continuously and is kept much cleaner.