OEM Carrier High Pressure Switch HK02ZA395 — 406/300 PSI for Model PY2PEB042090AA

This OEM high pressure switch (part number HK02ZA395) is the factory-specified safety control for the Carrier PY2PEB042090AA packaged unit. The high pressure switch continuously monitors refrigerant circuit pressure and cuts power to the compressor if system pressure exceeds the safe threshold — protecting the compressor from catastrophic failure caused by over-pressurization. When this switch fails or becomes stuck open, the system will lockout on a high pressure fault, preventing any cooling operation. Common symptoms include: intermittent compressor shutdowns, an active high pressure fault code on the control board, or a complete no-cooling condition even with the system calling for cooling.

• Specs: Opens at 406 PSI | Closes at 300 PSI | Rated 6(6)A at 240 VAC | PMAX 41B | Manufacturer: Sensata (OEM for Carrier) | Part No. HK02ZA395 / HK02ZA395A
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP). OEM pressure switches are calibrated to exact cut-out/cut-in setpoints. Aftermarket alternatives may deviate from the 406/300 PSI rating, risking compressor damage or nuisance lockouts — especially critical in packaged commercial units.
• Install Difficulty: 3/5 — Refrigerant circuit pressure must be at equilibrium before replacement. Tools needed: flat-head and Phillips screwdrivers, multimeter (to confirm switch continuity), wire labels. Always de-energize the unit at the disconnect before servicing. Verify refrigerant charge after installation to rule out underlying high-pressure faults.
• Warranty & Shipping: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse — get your system back online fast.

Compatibility: Verified direct-fit OEM replacement for Carrier model PY2PEB042090AA. Also replaces legacy part numbers: 312926-217, 71267D1, HK02ZA380, HK02ZA396, 19240027, HK02ZA400, 312926-225, 312926-226, 312926-233, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Always confirm the pressure switch setpoint rating on your unit's data plate before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you buy.