Carrier HK02ZA452 High Pressure Switch, Open 426 PSI, Close 320 PSI

Description

The Carrier HK02ZA452 is an OEM high pressure switch engineered to protect refrigerant circuits in Carrier heating and cooling systems. Designed to open at 426 PSI and close at 320 PSI, this switch provides reliable high-side pressure monitoring and automatic safety shutdown when system pressures exceed safe operating limits — helping prevent compressor damage and extending equipment life.

Key Features

• OEM Carrier replacement part — ensures proper fit and function
• Opens at 426 PSI to interrupt circuit under high-pressure conditions
• Closes at 320 PSI to restore normal operation once pressure normalizes
• Protects the compressor and refrigerant circuit from damaging overpressure events
• Direct drop-in replacement for compatible Carrier equipment
• Durable construction for long-term reliability in demanding HVAC applications

Specifications

• SKU: HK02ZA452
• Brand: Carrier
• Type: High Pressure Switch
• Open Pressure: 426 PSI
• Close Pressure: 320 PSI

Application

This high pressure switch is a critical safety component in Carrier residential and light commercial HVAC systems. It continuously monitors refrigerant system pressure on the high side and opens the circuit if pressure rises to dangerous levels, protecting the compressor from catastrophic failure. When pressures return to the safe close setpoint of 320 PSI, the switch resets and restores normal system operation. Always verify compatibility with your specific Carrier model before installation.