Norcolds 636658 Thermistor Assembly replaces part number 620871. This is the most current and updated Thermistor for 1200, 1210 and N1095 Norcold refrigerator models. It has a 4-prong connector that snaps into the light fixture at the light bracket for easy installation. The other end of the thermistor should be clipped onto the second fin from the right side. Refer to manufacturer recommendations to ensure proper fit and usage. Quick and easy installation.