Norcold | Refrigerator Thermistor With Wire Harness | 636658 | Replaces Norcold Thermistor 620871

Restore proper cooling performance and temperature regulation to your Norcold RV refrigerator with the Norcold 636658 Replacement Thermistor Assembly with Wire Harness. This genuine OEM replacement thermistor is designed to accurately monitor refrigerator compartment temperature and communicate with the refrigerator control board to maintain consistent cooling operation.

The Norcold 636658 is the current updated replacement for obsolete Norcold thermistor part number 620871 and is commonly used in Norcold 1200, 1210, 1211, and N1095 series refrigerators. This assembly includes the integrated wire harness and 4-pin connector for quick plug-and-play installation without wire splicing or modifications.

The thermistor clips directly onto the cooling fin inside the refrigerator compartment and connects to the interior light assembly using the factory 4-prong connector. By accurately sensing evaporator fin temperature, the thermistor helps regulate refrigerator cooling cycles and prevent freezing, inconsistent temperatures, and cooling failures.

This OEM Norcold replacement part is ideal for resolving common refrigerator temperature control issues including food freezing, poor cooling performance, fluctuating temperatures, and refrigerators that fail to cool properly on gas or electric operation.

Features

• Genuine Norcold OEM replacement thermistor assembly
• Includes factory-installed wire harness and 4-pin connector
• Direct replacement for superseded Norcold part number 620871
• Helps restore accurate refrigerator temperature regulation
• Plug-and-play installation with no wire cutting required
• Clips directly to refrigerator cooling fin
• Designed for Norcold RV refrigerator systems
• Quick and easy installation

Product Specifications

Compatible Norcold Refrigerator Models

Compatible with Norcold refrigerator series including:

• 1200 Series
• 1200LRIM
• 1201 Series
• 1210 Series
• 1211 Series
• N1095 Series

Fits most model variations and suffix configurations within these refrigerator families.

Common Symptoms of a Failed Thermistor

• Refrigerator freezing food
• Inconsistent refrigerator temperatures
• Refrigerator not cooling properly
• Cooling cycles running continuously
• Temperature setting has little or no effect
• Refrigerator compartment too warm or too cold

Installation Information

The thermistor installs by:

1. Snapping the 4-pin connector into the refrigerator light assembly
2. Clipping the sensor onto the second cooling fin from the right-hand side inside the refrigerator compartment

Installation typically requires no tools and can usually be completed within minutes.

Alternate Part Numbers

• 636658
• 620871
• NO636658
• NRC636658

Important Notes

• Verify refrigerator model compatibility before ordering
• Designed specifically for compatible Norcold refrigerator systems
• This is a temperature sensing thermistor assembly, not a control board or thermostat
• Professional installation recommended if diagnosis is uncertain

Need help confirming fitment?

Our team at United RV Parts is here to help you find the right replacement or parts for your RV Air Conditioner.

Text or call 817-984-1852 with the make and model number of your existing Air Conditioner and we’ll make sure you get exactly what you need the 1st time.

Product images are provided for illustration purposes only. Actual product appearance, packaging, color, labeling, included components, and manufacturer markings may vary from the images shown. 

Please refer to the product title, description, specifications, and part number to verify correct fitment and included contents before ordering.