Carrier 30GB660002 Thermister

The Carrier 30GB660002 Thermister is a critical OEM replacement temperature sensor designed for precision monitoring in commercial chillers and applied HVAC systems. Engineered to meet the exact specifications of the Carrier 30GB and 30GT series, this 10K Ohm sensor delivers accurate feedback for Entering Water Temperature (EWT), Leaving Water Temperature (LWT), Outside Air Temperature (OAT), and Return Gas Temperature (RGTA). As a direct successor to legacy part numbers HH79NZ016 and HH79NZ014, it ensures seamless integration with the Comfort Network interface, preventing compressor short-cycling and maintaining tight approach temperature tolerances. This factory authorized part is essential for technicians performing routine maintenance or troubleshooting thermistor resistance-to-temperature faults in 30GNP and 30HWA equipment. By providing high-accuracy sensing from -40°F to 257°F, it enables the chiller controller to optimize expansion valve positioning and stage refrigeration circuits effectively.

• Direct OEM Compatibility: Specifically engineered as a drop-in replacement for HH79NZ014, HH79NZ016, HH79NZ020, and 30HW400172.
• Multi-Point Application: Versatile enough to serve as an ambient air sensor, well-mounted water sensor, or suction line thermistor.
• Rugged Build Quality: Features a moisture-resistant seal and a 3-inch sensor length for durable performance in harsh HVAC/R environments.
• Accurate Calibration: Calibrated for 10K Ohm resistance at 77°F (25°C) to ensure precise microprocessor signaling.

Common Questions

What are the symptoms of a failing 30GB660002 thermistor?
Technicians typically observe erratic temperature readings at the control board, nuisance low-temperature alarms, or the chiller failing to stage correctly due to inaccurate EWT/LWT data. Resistance testing with a multimeter should reveal roughly 16K Ohms at 32°F or 10K Ohms at 77°F; significant deviation indicates a failed sensor.

Does this kit include all necessary mounting hardware?
The 30GB660002 kit generally includes the thermistor sensor assembly, a coupling assembly, and the required electrical connectors to complete a field replacement. Professional installation is recommended to ensure proper thermal contact within the sensor well or on the refrigerant line.

Is the 30GB660002 compatible with other brands?
While primarily used in Carrier chillers, it is also a certified replacement for certain Bryant and Payne commercial units. Always verify the specific unit model number against the service manual to confirm NTC thermistor specifications match.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

30GB660002 is the cross for HH79NZ016