Description
Norcold Thermistor Assembly 636658/ 618548 Dave Carter 50665 (replaces the 620871)
This is the current thermistor for all Norcold 1200 models, the 1210, N1095, N6XX models, N8XX models, 900/ 9000 models as well as the 2117. "Thermistor" = thermostat. Any numbers or letters after the model numbers are not important for this part. The thermistor has a 4 prong connector that will snap into the light fixture located up at the light bracket. The other end clips to the 2nd fin from the right hand side for 1200, 1210, and N1095 models. All other models will have it connecting to the 10th fin from the right hand side.
Fits the following Norcold models:
- 1200 (all models)
- 1201 (all models)
- 1210 (all models)
- 1211 (all models)
- N1095 (all models)
- N6XX: N611, N621, N622, N641, N642
- NX611, NX641, NXA641
- N8XX: N811, N821, N822, N841, N842, N843
- NX811, NX841, NXA841
- 900 series: 962, 963
- 9000 series: 9162, 9163, 9182, 9183
- 2117

Warranty Information
Product Videos
Reviews
18 Reviews
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Fixed my frosting problem and is very easy to install
This product is great except it should include the clip for the thermistor sensor unit. The old clip is generally rusted and requires replacement, also, but you don't realize it until after you begin to install the new wires.
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Great Customer Service
My refrig has not been working correctly since new. I finally narrowed down the issue and order the parts. Great delivery and the parts were exactly as ordered. Thank you
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the fix
Needed something that would work to cool the fridge, and it just happened to be the thermistor. Glad it wasn't anything else. $30.00 a little much for such a small part. Trouble shooting guide showed how to analyze the problem from the diagnostics which are not in the manual.
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Exactly the part I was looking for!
Thanks for the quick turnaround on my order. Had trouble locating this part at local RV dealers. You guys made getting the right part easy!
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Works Great
Thanks to the troubleshooting guide on this site, I was led to believe that my freezing problem was due to a bad thermistor. Now works like new.
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frozen food
my refrigerator was freezing everything in the lower compartment regardless of the setting that I had it on. the thermistor fixed the issue and was a simply fix. It connects to your light fixture.