Thats it. Just get a wrench that fits the nut behind the dial and remove the old thermometer. If you want to ensure your new thermometer is calibrated before you install it. Boil some water and insert the themometer probe into the center of the boiling water, about 2 1/2" in the water. Do not touch the sides or bottom of the pot with the probe. Water boils at 212 degrees (sea level). Temp on thermometer should settle in real close if not dead on 212.
When you put in your new thermometer just tighten it down to where its snug, do not over tighten.
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