OEM replacement thermistor assembly for Norcold N3104, N3141, N3150, N4104, and N4150 series RV refrigerators. Fits all serial numbers. Monitors internal temperature and signals the control board to regulate the cooling cycle. Includes integrated wire harness. Previously known as Norcold part number 623077.
The Norcold 50675 is the OEM replacement thermistor assembly for Norcold N3104, N3141, N3150, N4104, and N4150 series RV refrigerators — the temperature sensor that monitors the internal refrigerator compartment and communicates with the control board to regulate when the cooling cycle activates and deactivates. Previously known as Norcold part number 623077, this is the same direct-fit replacement under an updated part number.
When the thermistor fails it will either stop signaling the refrigerator to cool entirely, or signal it to cool constantly — both leaving food at unsafe temperatures. Fitting all N3104, N3141, and N3150 models regardless of serial number, the 50675 includes the integrated wire harness for direct connection to the control board.
• 1x Norcold 50675 thermistor assembly with wire harness Recommended to replace at the same time: • 633734 — Thermistor clip, fits all clip-on thermistor models. The clip frequently corrodes and breaks when the old thermistor is removed — replacing it while you're in there is straightforward preventive maintenance.
The 623077/50675 thermistor is a frequent cause of temperature control failure in these Norcold series. Typical failure symptoms: • Refrigerator not cooling at all despite power being present • Refrigerator running constantly without cycling off • Inconsistent or erratic temperature performance • Freezer barely cold or over-freezing Replace the thermistor before diagnosing the control board — it's a low-cost part and a very common failure point. Verify with an ohmmeter if in doubt.