Norcold Defrost Board 628668 (fits the 2117 model) This is the defrost board for the Norcold 2117 and 2118 model refrigerators, regardless of serial number.Fits these Norcold refrigerator models:2117 series: 2117IM, 2117IMC, 2117IMD, 2117IMCD, 2117IMBK, 2117IMCBK, 2117IMBKD, 2117IMCBKD, 2117IMSS, 21... See More