Carrier HK02SA440 Pressure Switch

The Carrier HK02SA440 High Pressure Cutout is a vital OEM replacement pressure switch engineered to protect HVACR systems from extreme internal pressures. This high pressure switch features a 660 PSI cutout and a 505 PSI reset (660/505#), ensuring the compressor shuts down immediately when safety thresholds are exceeded. Designed by Sensata (part number PS80-01-1055), this manual reset pressure control is a factory authorized part for Carrier, Bryant, and Payne rooftop units and split systems. It is built to withstand harsh industrial environments with a compact design that integrates seamlessly into liquid or suction lines. For technicians performing HVAC pressure switch troubleshooting, using this HVAC safety cutout ensures that 660 PSI refrigerant pressure spikes do not lead to catastrophic compressor failure. This high-reliability component is essential for maintaining systemic integrity in commercial and residential cooling applications.

• Precise Protection: Features a fixed 660 PSI open and 505 PSI close point to prevent system over-pressurization.
• OEM Compatibility: A factory authorized part ensuring direct fitment for Carrier, Bryant, and Payne equipment without field modifications.
• Durable Construction: Manufactured by Sensata with a 240VAC 6A rating, capable of operating in temperatures ranging from -30°C to 80°C.
• Critical Safety: Acts as a primary refrigerant pressure safety mechanism to prevent expensive compressor damage during condenser fan failure or blockages.

What is the differential for the HK02SA440 pressure switch?
This switch operates on a 155 PSI differential, breaking the circuit at 660 PSI and allowing for a reset once the system pressure drops to 505 PSI.

Is the Carrier HK02SA440 a manual or automatic reset?
This high-pressure cutout is designed as a safety device that requires the system to stabilize before the electrical circuit is restored at the 505# reset point.

Does this switch work with R-410A systems?
Yes, the 660 PSI cutout rating is specifically designed to handle the higher operating pressures associated with R-410A refrigerant systems.

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.