In the summer months, the air conditioner's thermostat should not be set any lower than 78 degrees Fahrenheit. Likewise, the settings should not be any higher than 68 degrees Fahrenheit in the winter. Keeping to these guidelines will help maximize energy savings.
Gradually adjust the temperature on the thermostat to help ensure everyone in the family is comfortable. Reduce, or raise, the temperature just one degree at a time and try it for a week. Each one-degree adjustment for an eight-hour period reduces your fuel bill costs. Gradually, you might be able to adjust three or even four degrees comfortably and save a chunk of money.