Exactly what does a furnace thermocouple do in your home?
If your heater is acting up on a freezing night and you're staring at the pilot light wondering what does a furnace thermocouple do, you aren't alone. Most people don't even know this little part exists until their house starts feeling like an icebox. In the simplest terms possible, a thermocouple is a tiny safety sensor that tells your furnace whether it's safe to keep the gas flowing or if it needs to shut everything down immediately to prevent a disaster. ...