I recommend to my readers that they keep a steady setting on their thermostats during the day. This is true in winter as well as summer—it helps the HVAC system avoid continual stopping and starting, which drains extra power. For a comparison, I like to sleep on a couch in the sunlight, and if I had to keep getting up and moving every ten minutes because the sunlight kept switching position, I’d use up a lot more energy than if I just could stay in one place.
But what if you are keeping the thermostat steady, but notice that the furnace is turning on and off rapidly anyway? If your furnace isn’t running for at least 15 minutes at a time before it cycles down, something may be wrong. I’ll go over some possible problems to help you see if you need furnace repair in Knoxville, TN to solve the problem.