OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY1PJB048130ABAA

This is the genuine OEM Carrier high pressure switch (part number HK02ZA395), factory-specified for the Carrier PY1PJB048130ABAA packaged unit. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors refrigerant discharge pressure and opens the circuit to shut down the compressor if pressure exceeds the safe threshold. When this switch fails or trips repeatedly, you'll see symptoms like nuisance high-pressure lockouts, compressor short-cycling, or a system that won't run despite normal operating conditions. Replacing a faulty switch with the correct OEM part restores factory-calibrated protection and prevents compressor damage from over-pressurization.

• Specs: Opens at 395 PSI | Closes (resets) at 295 PSI | 1/8" NPT thread | Rated 6(6)A at 240 VAC | Sensata PS80-03-0018 platform | PMAX 41B | Replaces: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, and additional superseded part numbers
• OEM vs Generic: This is a genuine Carrier OEM part — factory-calibrated to exact 395/295 PSI trip points. Aftermarket substitutes often carry wider pressure tolerances, risking either nuisance trips or insufficient compressor protection. OEM is always the recommended choice for refrigerant-side safety components.
• Install Difficulty: 3/5 — Requires EPA 608 refrigerant certification to legally open the refrigerant circuit. Tools needed: manifold gauge set, adjustable wrench, thread sealant (refrigerant-rated), multimeter. Always recover refrigerant before disconnecting; verify system is at 0 PSI before removing the switch. Check for leak with electronic detector after reinstallation.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed for the Carrier PY1PJB048130ABAA packaged unit. Verify your unit's data plate and existing switch PSI rating before ordering — multiple pressure ratings exist in the HK02ZA series. Our fitment team is available to confirm compatibility before you order. In stock and ready to ship today.