OEM Carrier High Pressure Switch HK02ZA395 for Model PY2PNB042090NB

This is the genuine OEM high pressure switch (part number HK02ZA395) factory-specified for the Carrier PY2PNB042090NB packaged unit. The high pressure switch is a critical refrigerant-circuit safety device that monitors the high side of the refrigerant loop. When refrigerant pressure exceeds a safe threshold — caused by a dirty condenser coil, failed condenser fan, refrigerant overcharge, or blocked airflow — the switch opens and shuts down the compressor to prevent catastrophic damage. Common symptoms of a failed high pressure switch include nuisance lockouts, the system not cooling, or a fault code indicating a high-pressure trip with no actual over-pressure condition present.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT male thread connection | Rated 6(6)A at 240 VAC | Sensata PS80-03-0018 platform | PMAX 41B
• OEM vs Generic: This OEM Carrier switch uses factory-calibrated cut-out and cut-in setpoints (395/295 PSI). Aftermarket alternatives may carry ±5–10% PSI tolerance variance, risking nuisance trips or, worse, failing to protect your compressor at the correct threshold.
• Install difficulty: 2/5 — Always recover refrigerant before removing any refrigerant-circuit component. Tools needed: refrigerant recovery unit, manifold gauge set, adjustable wrench, and thread sealant (non-hardening). Confirm system is de-energized and pressure is relieved before disconnecting the switch.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier PY2PNB042090NB packaged units. Also replaces legacy part numbers: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, HK02ZA501, and 19240027. Always verify your unit's data plate and existing switch PSI ratings before ordering. Our fitment team is available to confirm compatibility before you buy.