Carrier HK02ZB309 Pressure Switch

The Carrier HK02ZB309 Pressure Switch is a critical OEM replacement part designed for high-pressure monitoring in Carrier, Bryant, and Payne HVAC systems. This vapor pressure switch features precise factory-set trip points, with an open pressure of 384 PSI and a close pressure of 309 PSI. Engineered for Puron (R-410A) units, it maintains system integrity by preventing hazardous overpressure events and ensuring the compressor operates within safe parameters. Field technicians rely on the HK02ZB309 for its 120/240V compatibility and its robust braze mount design, which ensures a leak-tight seal in demanding residential air conditioning and furnace applications. Integrating this genuine furnace part restores factory-spec performance, protecting both the equipment and the operator from potential system failures. Whether you are performing routine HVAC maintenance or an emergency pressure switch replacement, this component provides the exact differential required for stable refrigerant cycle management.

• Precision Pressure Control: Pre-calibrated at 384 PSI (Open) and 309 PSI (Close) for accurate system cycling and safety.
• OEM Compatibility: Specifically designed as a direct Carrier HK02ZB309 replacement for seamless integration into Puron units.
• Industrial-Grade Build: Features a durable braze-type mount to withstand high-vibration and high-pressure environments.
• Wide Voltage Range: Rated for 120/240V, making it versatile for various residential and light commercial HVAC configurations.

• What are the cut-in and cut-out points for the HK02ZB309? This switch is designed to open the circuit at 384 PSI and close it once the pressure drops back to 309 PSI.
• Is the HK02ZB309 compatible with R-22 systems? This switch is primarily engineered for Puron (R-410A) units due to its high-pressure trip points. Always verify your system’s technical requirements before installation.
• Why is my high-pressure switch tripping? A trip at 384 PSI often indicates restricted airflow, a dirty condenser coil, or an overcharged system. Ensure all mechanical variables are checked before replacing the switch.

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.