How to Start an Air Conditioner for the First Time

Air conditioners are complicated machines with many parts and connections.

Maintain air conditioners on a regular basis.Maintain air conditioners on a regular basis.
When they have not been used for some time, these parts and connections may need extra care to get started again. If the air conditioner does not start automatically, there are steps to take that may resolve the problem.

Remove all debris from around and on the air conditioner. Confirm that the connections leading to and from the unit are tight and secure.

Flip the air conditioner circuit switch to the on position. If your unit has a separate power switch, confirm that it is turned on as well.

Close all windows in your home. Turn on the unit through your thermostat by lowering the temperature.

Go outside to confirm that the unit has started running and does not sound like it is malfunctioning. If you hear a "grr" sound, that is the compressor having trouble starting. Turn the unit off and wait five minutes. Start it again and listen. Confirm that you hear the fan spinning. If you do not, or if the unit does not start, call a repairman.

About the Author

Brendan O'Brien is a professional journalist in Milwaukee, Wis. He has worked for several news organizations, newspapers such as the "Milwaukee Journal Sentinel" and trade magazines during his career of more than 15 years. He is currently a freelance writer who works for several publications.