OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY1PPB048115AAAA

This is the genuine OEM high pressure switch (part number HK02ZA395) factory-specified for the Carrier PY1PPB048115AAAA packaged heat pump unit. The high pressure switch is a refrigerant-side safety device that monitors system discharge pressure in real time. When head pressure rises beyond safe operating limits — due to a dirty condenser coil, failed condenser fan motor, refrigerant overcharge, or blocked airflow — the switch opens the control circuit, shutting down the compressor to prevent catastrophic failure. A faulty switch will trigger nuisance lockouts, cause repeated high-pressure fault codes, or fail to protect the system if it sticks closed.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread | Quick-connect electrical terminals | Rated 6(6)A at 240 VAC | Sensata PS80-03-0018 platform
• OEM vs Generic: The OEM HK02ZA395 is manufactured to exact Carrier factory tolerances for cut-out and cut-in pressure. Aftermarket switches can deviate significantly in trip point accuracy, risking either false lockouts or inadequate compressor protection.
• Install difficulty: 2/5 — Always recover and evacuate refrigerant before removing the switch (EPA 608 certification required). Tools needed: refrigerant recovery machine, manifold gauges, 1" open-end wrench, quick-connect terminal puller. Photograph wiring before disconnecting. Leak-check with nitrogen after installation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the direct factory replacement for Carrier PY1PPB048115AAAA packaged heat pump units. Also replaces legacy part numbers including 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Verify your unit's data plate and existing switch PSI rating before ordering. Our parts specialists are available to confirm fitment — order with confidence.