Carrier HK02SB027 Pressure Switch

The Carrier HK02SB027 is a mission-critical OEM low pressure switch engineered to protect the compressor from low-suction conditions and potential evaporator coil freezing. This factory-authorized component features a precise 44-27# pressure rating, with a cut-out set at 27 PSI and a reset (cut-in) at 44 PSI. As a low pressure cutout switch, it monitors refrigerant levels continuously, opening the control circuit to prevent system damage if a leak occurs or airflow is restricted. Built with hardened materials to withstand high-cycle commercial and residential applications, this Carrier HVAC pressure switch ensures the refrigeration circuit maintains peak reliability. For technicians performing a Carrier low pressure switch replacement, this unit offers a drop-in fit with standard 1/4 inch SAE flare connections and is compatible with 120V, 240V, or 277V control circuits. Integrating a genuine HK02SB027 pressure switch preserves the system's operational integrity and meets all factory specifications for safety and performance.

• System Protection: Actively prevents compressor failure by interrupting the electrical signal during low-pressure scenarios.
• Precise Calibration: Factory-set 44-27# thresholds ensure accurate response times without the need for field adjustment.
• OEM Reliability: Genuine Carrier replacement part designed for specific tolerances that universal switches often fail to meet.
• Versatile Application: Fits a wide range of Carrier, Bryant, and Payne rooftop units and split systems, including models 48HCED111A and 50HCQA041A.
• Durable Construction: Engineered to operate in extreme environments with a rated temperature range of -40 to 176 degrees Fahrenheit.

What are the cut-in and cut-out points for the HK02SB027?
This switch is rated for 44-27#, meaning it will cut out (open the circuit) when the pressure drops to 27 PSI and reset (close the circuit) when the pressure rises back to 44 PSI.

Is the HK02SB027 compatible with R-410A systems?
Yes, this low pressure switch is commonly utilized in R-410A air conditioning and refrigeration systems to monitor the low-side suction pressure and protect against loss of charge.

Can this switch be mounted in any orientation?
Yes, the Carrier HK02SB027 is designed for flexible installation and can be mounted in any position within the cabinetry or on the refrigerant line.

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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.