Norcold Cooling Unit for N610, N611, N621, N641, NX611, NX641, NXA641, and 900/ 9000 models  COOLING UNIT 632307 This is the cooling unit for all Norcold N6 models as well as all 900/ 9000 model refrigerators. This include: N610 N611 N621 N622 N641 N642 NX611 NX641 NXA641 962 9162 Part # 632307... See More