I have a Dutchwest/VC Sequoia FA455 (from early 90s) with a catalytic combustor, and the probe thermometer was only half there when I bought the house. I am trying to replace it, and was able to get all the pieces off except the prob itself. This is what I have left, and I'm wondering if I'm missing some important step on getting this out. Thanks in advance for helping this stove newbie!