Norcold Thermistor Assembly 629491 Rod/ Air (fits the 2117 model) This is the current rod/ air thermistor for all 2117 models, regardless of serial number. Fits all: 2117IM 2117IMD 2117IMSS 2117IMSSD 2117IMWPM 2117IMWPMD 2117IMBK 2117IMBKD1200   *we recommend also replacing the clip. You c... See More