OEM replacement thermistor assembly with protective cover for Norcold N8DC, N10DC, N15DC, and N20DC series DC compressor refrigerators. Monitors internal temperature and communicates with the control board to regulate cooling. Includes wiring harness and cover. Previously known as Norcold part number 640149.
The Norcold 50888 is the OEM thermistor and cover assembly for Norcold's N8DC, N10DC, N15DC, and N20DC series DC compressor refrigerators — the temperature sensor that monitors the internal compartment temperature and signals the control board to regulate the compressor's cooling cycle. Previously known as Norcold part number 640149, this is the same direct-fit assembly under an updated part number.
The cover protects the thermistor sensor and wiring harness from moisture and physical damage inside the refrigerator compartment. When the thermistor fails, symptoms include inconsistent cooling, temperature readings that don't match the set point, or the refrigerator failing to maintain cold temperatures. The assembly includes the thermistor, protective cover, and integrated wiring harness for direct connection to the control board.
• 1x Norcold 50888 thermistor assembly • Protective cover • Integrated wiring harness Confirm your model number from the label inside the refrigerator before ordering — confirm "DC" appears in the model designation.
• Refrigerator temperature inconsistent or warmer than set point • Compressor runs constantly without reaching target temperature • Temperature display shows inaccurate readings • Refrigerator fails to cool after a period of normal operation The thermistor is a low-cost part relative to the control board — replace it first before diagnosing more expensive components.
Different Norcold refrigerator series use different thermistors — they are not interchangeable: • 50888 / 640149 — N8DC, N10DC, N15DC, N20DC (DC compressor) (this item) • 50665 / 621742 — 1200 Series (absorption) with lamp • 50675 / 623077 — N3104, N3141, N3150, N4104, N4150 (absorption) • 638391 — N7, N8, N10 Polar (absorption) Always confirm your exact model number — "DC" in the model name indicates a DC compressor unit requiring this thermistor.