If you own a Harman pellet stove, you may have heard about DIP switches. These tiny switches are on your control board and serve as the “settings menu” for your stove. They tell your stove how to ignite, how much fuel to feed, and even which temperature sensor (ESP probe) it should read. Most owners will never need to change them. However, if you replace your control board or if your stove is struggling to ignite properly, knowing what DIP switches do (and how to check them)