Description
Carrier HK02ZB421 High Pressure Switch Overview
The Carrier HK02ZB421 is an OEM high pressure switch engineered to protect refrigerant circuits from dangerous over-pressure conditions. Designed as a direct replacement for Carrier systems, this switch provides reliable, automatic pressure monitoring to safeguard compressors and refrigerant-side components.
Key Specifications
- Switch Type: High Pressure
- Open Pressure: 610 PSI
- Close Pressure: 420 PSI
- Lead Length: 48 inches (4 feet)
- OEM Part Number: HK02ZB421
- Brand: Carrier
Features & Benefits
- Protects compressor and refrigerant circuit from high-pressure faults
- Opens at 610 PSI to interrupt circuit and prevent system damage
- Closes at 420 PSI, allowing system restart once pressure normalizes
- 48-inch lead wires provide flexible installation reach
- Genuine Carrier OEM component ensures proper fit and reliable performance
- Ideal for service replacement in Carrier residential and light commercial HVAC equipment
Application
The HK02ZB421 is a direct OEM replacement high pressure switch for compatible Carrier air conditioning and heat pump systems. It monitors refrigerant-side pressure and automatically opens the circuit when pressure reaches 610 PSI, protecting the compressor from damage. The switch resets and closes at 420 PSI. The 48-inch leads allow for convenient routing during installation or replacement.
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