How does a flame sensor work in a furnace exactly?
If you've ever wondered how does a flame sensor work in a furnace, you're basically looking at one of the smallest but most critical safety features in your entire home. It's this tiny, unassuming metal rod that sits right in the path of the burner's fire, and while it doesn't look like much, it's the only thing standing between your cozy living room and a basement full of unburned natural gas. ...