Exactly what does a thermocouple do on a furnace?
If you've ever found yourself shivering in a cold house because your heater decided to take a nap, you might be asking what does a thermocouple do on a furnace and why such a tiny part carries so much weight. It's one of those components that most people never think about until it fails, but once it does, your entire heating system basically becomes a very expensive metal box taking up space in your basement. ...