OEM Carrier High Pressure Switch 448/327 PSI for Model PY1REA060115AAWB

This factory OEM high pressure switch is the direct-replacement safety control for the Carrier PY1REA060115AAWB packaged unit. The switch continuously monitors refrigerant system pressure on the high side and opens the control circuit when pressure exceeds the factory-set trip point, protecting the compressor from damage caused by overcharge, refrigerant restriction, or inadequate condenser airflow. When it fails or trips and will not reset, the system locks out on a high-pressure fault — often presenting as no cooling, a compressor that short-cycles, or a control board fault code indicating a high-pressure safety trip.

• OEM Part Numbers: HK02ZA442 (High Pressure Switch) | HK02ZB044 (Pressure Switch) — both are factory-authorized replacements for this model
• Specs: 448 PSI opening pressure | 327 PSI closing pressure | Factory-matched trip/reset points | Watertight one-piece housing rated for indoor and outdoor installation
• OEM vs Generic: OEM switches use factory-calibrated trip points (±2% tolerance). Off-brand substitutes often carry wider tolerances, risking nuisance trips or, worse, allowing over-pressure conditions that damage the compressor — a repair that costs 10× more than this switch.
• Install Difficulty: 3/5 — System must be recovered and depressurized before replacement on the high-pressure circuit. Tools needed: manifold gauge set, refrigerant recovery equipment, adjustable wrench, and a multimeter to verify continuity after installation. Always follow lockout/tagout procedures.
• Warranty: 1-year OEM factory warranty. In-stock — ships same business day from our warehouse.

Compatibility: Engineered and factory-spec'd for the Carrier PY1REA060115AAWB packaged unit. Cross-references OEM part numbers HK02ZA442 and HK02ZB044. Verify your unit's data plate refrigerant type and confirm the high-side pressure switch location before ordering. Our HVAC parts specialists are available to verify fitment — reach out before you order if you have any questions.