I have not seen this myself before, heard about it, but I'm assuming this is what you are talking about
https://www.snip-the-tip.com/cgi-bin/articca.cgi
I scanned though it, and if you are sure your thermistor is bad, there is a test for this, then this is not a bad thing to try on a bad thermistor. I myself would not do it just to gain the adjustable feature. If the fridge is working right and vented right, it should and will get down close to 33F and maintain there. Adding a vent stack fan in the right place also helps create a more stable colder fridge.
Not sure what model fridge you have, but there is work involved in changing a like for like or upgraded part from Dometic to get the old one out and the new one in. Any of the larger fridges, you most likely end pulling the fridge forward to gain access to the back of the fridge. Not that, that is extremely hard to do, but it is more involved.
Let us know how this comes out.
Thanks
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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