Fall Tune Up Part 4: Inside the Furnace We Go

Now we can actually start opening things and seeing what's going on inside. So even though there's not a lot in here I'm still gonna brush it out spend a little time feeling all the wire connections making sure all the wire nuts are tight Let's turn the power off to it before I fire the unit off I'll do a couple of things before everything gets real hot So the first thing I'll do is I'm gonna clean the flame sensor The flame sensor is a safety device that quite literally senses the flame when the furnace is running It needs to know that there's a flame so that it doesn't just spit out raw gas if the flame sensor isn't working It'll just shut down I usually just take a bill a dollar bill of some kind and I find this part here His shirt I use that part because it's just a little bit grittier right there on the bill go over that whole thing like this