Does changing the thermostat often affect your electricity bill?

Most likely will.Leave it at 78 and don%26#039;t touch it and you will save much cash.|||It could, if you install a programmable one and set it to go a couple of degrees higher or lower for when you need it. Setting the thermostat too low will make your furnace work to hard to bring the temperature up to what you want it to be, when you need it.|||Absolutely, sort of... When you come in after work and it is 80 inside. You turn the a/c down to 50 in hopes to get it really cold, really fast. Pretty soon you are getting chilly and look over and a/c says its 68. So you kick it back up to about 72 to stay comfortable. You have just wasted a lot of energy and life of the a/c. Even though four degrees does not seem like a lot, it is in energy measurements. Long story short, turning the a/c down past a comfortable temperature (71) will not cause the unit to cool any faster than turning it to a comfortable temperature (71) in the first place. Thus said, putting it on a comfortable temperature (71) in the first place you will not over cool the house by forgetting to turn it back up when you are cool. When you forget to change the thermostat back is when you pay more on your bill. Good luck...