Check the listing for details. Fits for Norcold N610, N611, N621,N622 Replacement Thermistor Assembly 618548. Color: White, Condition: New. Listed at 9.59 USD. 618548 Thermistor Assembly for RV Refrigerator Models N6 N8 900 9000 Replaces 621742 with Wire Harness Product Description Fits models:N610, N611, N621, N622, N641, N642, NX611, NX641, NXA641, N811, N821, N822, N841, N842, N843, NX811, NX841, NXA841. Fits models:962, 963, 9162, 9163, 9182, 9183, 2117,2118. Function:The thermistor keeps your refrigerator operating correctly by allowing the refrigerator to stay within a range of temperatures. The cooling cycle will turn on if the temperature rises too high. Installation:The thermistor assembly has a 4 prong connector that will snap into the light fixture located at the light bracket. The other end clips to the 10th fin from the right hand side. Includes:1 x Thermistor Assembly with Wire Harness. Specifications Thermistor Assembly with Wire Harness for Refrigerator models below Fits models:N610, N611, N621, N622, N641, N642, NX611, NX641, NXA641, N811, N821, N822, N841, N842, N843, NX811, NX841, NXA841,962, 963, 9162, 9163, 9182, 9183, 2117,2118 Cross reference:618548,621742