OEM Carrier High Pressure Switch HK02ZA395 — 406/300 PSI for Model PY2PNB048130AB

This OEM Carrier high pressure switch (part number HK02ZA395) is the factory-specified refrigerant safety control for the Carrier PY2PNB048130AB packaged unit. The switch continuously monitors refrigerant discharge pressure, cutting power to the compressor if pressure exceeds 406 PSI and automatically resetting when pressure drops back to 300 PSI. When this switch fails or trips on a hard lockout, symptoms include the compressor shutting off mid-cycle, the unit failing to cool entirely, or tripped fault codes on the system control board — all signs the high-side pressure protection circuit has been interrupted.

• Specs: Opens at 406 PSI | Closes (resets) at 300 PSI | 6(6)A @ 240 VAC | 1/8" NPT male thread | Sensata PS80-03-0018 platform | PMAX 41 bar | Certifications: EN12263, ENEC05, EN60730-2-6
• OEM vs Generic: This is a genuine Carrier OEM part manufactured to exact factory pressure setpoints. Aftermarket substitutes often use broader tolerance ratings, risking nuisance trips or — worse — delayed cutout that can allow compressor damage from high refrigerant pressure events.
• Install Difficulty: 2/5 — Recover all refrigerant and confirm zero system pressure before removal. Tools needed: refrigerant recovery machine, 1/8" NPT fitting wrench, PTFE thread tape, manifold gauges. Always verify wiring polarity before reinstalling. Recommend professional installation if refrigerant certification is not held.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY2PNB048130AB packaged units. Also cross-references legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Verify refrigerant type and pressure setpoints against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by.