It’s attached to the white wire, top right. Looks like the piece in my hand. One scew holding it in. One electrical connection. And is basically a metal rod with a bit of porcelain insulator.

I got a universal part that I needed to bend to match the one in the furnace.

Symptoms were that it wouldn’t stay lit. It would try, light up for a second and go out. Exhaust fan stay on the whole time.

We got up normal time for work but she had off and I had a snow day. She noticed that it was getting cold in the house so I went to check. The furnace is plugged into an outlet mounted to the side of it’s self. The GFCI was tripped so I reset it. It came to life but just the fan. Then I heard it trying to light and fail a couple times. Looked up some videos about “my furnace won’t stay lit” and they all said start there. Just happened to be the problem.