OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY1PJB048115NBAA

This genuine OEM high pressure switch (part number HK02ZA395) is the factory-specified refrigerant-side safety device for the Carrier PY1PJB048115NBAA packaged unit. Wired in series with the compressor control circuit, it continuously monitors refrigerant discharge pressure and opens the circuit at 395 PSI to protect the compressor from catastrophic over-pressure damage. Once system pressure drops, the switch automatically resets at 295 PSI, restoring normal operation. Common failure symptoms include nuisance high-pressure lockouts, compressor short-cycling, or the unit refusing to cool even when refrigerant charge and airflow appear normal — a faulty switch can signal a fault where none exists.

• Specs: Opens at 395 PSI | Closes (resets) at 295 PSI | 1/8" NPT male port | 240 VAC rated | SPST normally-closed | Sensata PS80 platform (cross-ref: PS80-03-0018)
• OEM vs Generic: Genuine Carrier OEM switches are calibrated to factory ±tolerance. Aftermarket equivalents can drift in setpoint over time, causing either nuisance trips or — more dangerously — failing to open under true over-pressure conditions.
• Install difficulty: 2/5 — Recover refrigerant before removing the switch (EPA Section 608 required). Tools needed: adjustable wrench, refrigerant recovery machine, manifold gauge set, Teflon tape. Always leak-check the new fitting after installation.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Verified fit for Carrier model PY1PJB048115NBAA. Also replaces legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Confirm your unit's data plate and existing switch port size before ordering. Our fitment team is available to verify compatibility before you buy.