Your furnace has a lot of components. If something is wrong, how could you possibly guess which component is causing the problem? First, for safety’s sake, let us be clear that any furnace problem should be diagnosed and repaired by a qualified technician. But it is always helpful to better understand the heating system in your own home.
One of the components that can prevent your furnace from working properly is the flame sensor. As the name implies, it senses the flame. What can go wrong with your flame sensor, and what are the signs that this is the root of your furnace problem? Here’s a rundown of what the flame sensor is there to do, what can prevent it from doing its job properly, and what that does to your furnace.