OEM Carrier High & Low Pressure Switch Kit (HK02ZA395 / HK02ZB038) for Model PH10JA04200GABAA

This factory-matched OEM pressure switch kit includes both the high pressure switch (HK02ZA395) and the low pressure switch (HK02ZB038) for the Carrier PH10JA04200GABAA heat pump packaged unit. Pressure switches act as critical refrigerant-circuit safety guards: the high-side switch opens at 395 PSI (closes at 295 PSI) to protect the compressor from dangerously elevated discharge pressures, while the low-side switch opens at 7 PSI (closes at 22 PSI) to prevent compressor operation during low-charge or loss-of-charge conditions. When either switch fails or trips and won't reset, the system will lock out on a fault code, deliver no heating or cooling, and may display a refrigerant protection alarm on the thermostat or control board.

• Specs — High Pressure Switch (HK02ZA395): Open 395 PSI | Close 295 PSI | 1/8" NPT thread | 6(6)A 240 VAC | Sensata PS80-03-0018 platform | Replaces 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, and others
• Specs — Low Pressure Switch (HK02ZB038): Open 7 PSI | Close 22 PSI | 50" lead wires | Carrier Pressurestat design | Fits Carrier, Bryant, and Payne refrigerant circuits
• OEM vs Generic: These are genuine Carrier OEM switches calibrated to exact cut-in/cut-out pressures. Aftermarket switches frequently carry wider pressure tolerances that can allow the compressor to operate outside safe parameters, accelerating wear or triggering nuisance lockouts.
• Install difficulty: 3/5 — System must be fully de-energized and refrigerant pressure must be verified at zero before disconnecting any pressure switch. Tools needed: manifold gauge set, 1/2" open-end wrench, needle-nose pliers, and a multimeter to confirm continuity before reinstall. Recommend replacing both switches as a set when either one fails.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH10JA04200GABAA packaged heat pump unit. Always verify refrigerant type and system operating pressures against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you purchase — call or chat us today. In stock and ready to ship.