OEM Carrier High Pressure Switch HK02ZA395 for Model PH2PPB042000AA

This OEM high pressure switch is the factory-specified replacement for the Carrier PH2PPB042000AA heat pump system. The high pressure switch is a critical refrigerant-side safety device that monitors system pressure and cuts power to the compressor when unsafe high-side pressure is detected. When this switch fails or trips, you'll typically experience a system lockout, compressor not running, or a fault code indicating a high pressure trip — even when refrigerant charge and airflow are normal. A faulty switch can cause nuisance lockouts or, conversely, allow the compressor to run unprotected under dangerously high pressures.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread connection | 240 VAC rated | Factory OEM part number HK02ZA395 (also cross-references HK02ZA395A)
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact factory setpoints. Generic aftermarket switches often carry wider PSI tolerances, risking either nuisance trips or insufficient compressor protection — neither acceptable in a heat pump application.
• Install difficulty: 2/5 — Recover refrigerant before opening the system per EPA Section 608 regulations. Tools needed: manifold gauge set, refrigerant recovery machine, adjustable wrench, multimeter. Always confirm switch continuity before assuming refrigerant issues.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier PH2PPB042000AA heat pump condensers. Also cross-references legacy Carrier part numbers including 312926-217, 71267D1, HK02ZA380, HK02ZA396, and HK02ZA400. Verify PSI setpoints against your unit's data plate and service manual before ordering. Our technical team is available to confirm fitment.