In the summer, the ideal temperature for your thermostat is 75 to 78 F when you're home, and 80 degrees when you're away or asleep, Dukes said. The DOE suggests 78 F during the day, 82 F when you're ...

If the problem persists, you may need to replace your thermostat. The post How to Adjust a Mechanical Thermostat appeared ...

Air conditioners can only really cool your home to 15 to 20 degrees below the outdoor temperature, so setting the thermostat too low can result in your system running without being effective.