Norcold AC Heater/ Heating Element 638374/ 50822 (fits the Polar N7/ N8/ N10/ and newer N6XX/ N8XX/ N1095 models) This AC heater/ heating element replaces the Norcold 630811.The Dave Carter & Associates new part number is 50822 and is the exact same as the 638374. This is the AC heatin... See More