Rcd hk02za439 High Pressure Switch Hvac

Product Description

The RCD hk02za439 is a high pressure switch designed for use in HVAC refrigeration circuits. It monitors system refrigerant pressure and interrupts the control circuit when pressure exceeds a safe operating threshold, protecting compressors and refrigerant-side components from damage caused by abnormal high-side pressure conditions. Licensed HVAC technicians install this switch as part of routine service, system commissioning, or component-level troubleshooting on refrigerant systems. The part is also referenced under cross-reference number 448-327.

This high pressure switch is used in residential and light commercial central air conditioning and heat pump systems. It is typically installed in the high-side refrigerant line or at the compressor discharge port. When a system presents with compressor lockout faults, nuisance trips, or suspected refrigerant overcharge conditions, replacement of the high pressure switch is a common diagnostic step. This part is associated with Carrier HVAC central air parts and accessories applications.

Key Features

• Interrupts control circuit on high-side refrigerant pressure exceedance to protect compressor
• OEM-style replacement form factor for straightforward field installation
• Cross-referenced as 448-327 for parts lookup and procurement
• Suitable for central air conditioning and heat pump refrigerant circuit applications

Compatibility

Associated with Carrier HVAC central air conditioning parts and accessories applications. No specific model numbers or system families were provided in the product data. Verify fitment against equipment documentation and the 448-327 cross-reference before installation.

Installation Notes

Installation and replacement of refrigerant-circuit pressure switches must be performed by an EPA Section 608 certified HVAC technician. Before servicing, recover refrigerant from the affected circuit per applicable regulations and de-energize the system at the disconnect. Observe standard refrigerant handling procedures and confirm the replacement switch pressure rating matches the original equipment specification before returning the system to service.

Technical Specifications

• Type: High Pressure Switch
• Cross-Reference: 448-327

Standard Information

• Brand: RCD
• Manufacturer Part Number: hk02za439