I have a 5' freezer we don't use and I needed another fridge. So did a search and discovered its simple to do using this control. Just did the conversion on my woods freezer and it only took 1 hrs time.
Here's the part I bought and it can also be used to control a heated compartment accurately..........like a welding rod compartment!.
and the good thing is that a freezer has more insulation .....this conversion is done by keggers to convert a chest freezer into a beer keg cooler. lots on youtube.
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if the time ever comes you can't see it, you can lay on your back and do it from underneath.