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When a Norcold refrigerator starts cooling erratically or the control board can't get an accurate temperature reading, the thermistor is one of the first components worth checking. The Norcold 636658 is a factory-fit thermistor assembly for 1200, 1210, and N1095 series units.
It's a small, precise part, but it plays a big role — feeding temperature data back to the control board so the fridge can cycle correctly and hold its set point.
A quick, targeted fix for cooling irregularities on compatible Norcold units rather than replacing the whole cooling unit.
