OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY1PPB048090ABAA

This is the genuine OEM Carrier high pressure safety switch (part number HK02ZA395), factory-specified for the Carrier PY1PPB048090ABAA packaged unit. The high pressure switch is a critical refrigerant-circuit safety device that monitors the high side of the refrigerant system and cuts power to the compressor if pressure exceeds a safe operating threshold. A failed or out-of-spec switch typically causes nuisance high-pressure lockouts, compressor short-cycling, or a system that trips immediately on startup — even when refrigerant charge and airflow are normal.

• Specs: Opens (trips) at 395 PSI | Resets (closes) at 295 PSI | 1/8″ NPT fine thread port | 6(6)A rated | 240 VAC | Sensata PS80-03-0018 platform | SPST normally closed
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP), manufactured by Sensata to exact factory pressure setpoints. Aftermarket switches often carry ±10–15 PSI tolerances that can cause premature trips or fail to protect the compressor from a true overpressure event.
• Install difficulty: 2/5 — Recover refrigerant charge before accessing the high-side service port. Tools needed: refrigerant recovery machine, manifold gauges, 1/2″ open-end wrench, and Teflon tape for the NPT threads. Always leak-check the port after installation before recharging.
• Warranty & Shipping: 1-year OEM factory warranty against defects. In stock — ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model PY1PPB048090ABAA. This part also supersedes legacy Carrier part numbers including 312926-217, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501 — verify your unit's data plate and existing switch PSI markings before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by.