ClimateMaster 17B0031N04 Black Thermistor Sensor 48-Inch OEM Replacement

The ClimateMaster 17B0031N04 is a genuine OEM replacement thermistor sensor designed for use in ClimateMaster geothermal and water-source heat pump systems. Featuring a 48-inch black lead, this NTC (Negative Temperature Coefficient) sensor delivers high-precision thermal monitoring to protect system components and maintain reliable operation.

This thermistor interfaces directly with ClimateMaster control boards—including CXM and DXM2—providing real-time resistance-to-temperature feedback that enables low-temperature cutout protection. By accurately reporting coil or refrigerant line temperatures, it allows the control board to trigger safety lockouts before conditions such as evaporator freeze-up or compressor slugging can occur.

Key Features:

• Genuine OEM Part: Factory new ClimateMaster original equipment with full factory warranty coverage
• NTC Sensor Technology: 10K Ohm resistance at 77°F for accurate, reliable temperature-to-resistance conversion
• 48-Inch Lead Length: Provides flexible routing and installation across a variety of cabinet sizes and coil configurations
• Color-Coded Black Lead: Allows for rapid identification and correct wiring at the control board harness during installation or service
• System Protection: Prevents evaporator freeze-up and compressor damage by triggering low-temperature safety lockouts
• Control Board Compatible: Calibrated for seamless integration with ClimateMaster CXM and DXM2 control boards

This thermistor can be tested with a standard ohmmeter by measuring resistance across the leads (connector removed) and comparing the reading against a 10K NTC resistance-temperature chart. This sensor is a direct OEM replacement part ideal for resolving temperature sensor faults and nuisance lockout conditions in ClimateMaster geothermal heat pump units.