During the warmer months, the thermostat to an air conditioner should be set at 78 degrees Fahrenheit. If this is not comfortable, some experts recommend lowering the temperature to no less than 74 degrees to avoid high utility costs.
The Environmental Protection Agency states that raising the temperature from 72 to 78 degrees Fahrenheit can decrease the cost of the utility bill by 18 percent. There are other steps to take to reduce the amount of electricity used during warmer weather. Using fans can save 60 percent on cooling costs. Keeping windows shielded from the sun by closing blinds and curtains also helps to maintain cooler inside temperatures. Check for leaks and seal areas of the home where air may escape such as windows and doors.