OEM Carrier High & Low Pressure Switch Kit HK02ZA395 / HK02ZB038 for Model PH10JA042000ABAA

This genuine OEM Carrier pressure switch kit includes both the HK02ZA395 High Pressure Switch (406 PSI open / 300 PSI close) and the HK02ZB038 Low Pressure Switch (7 PSI open / 22 PSI close) — the factory-specified refrigerant-side safety switches for the Carrier PH10JA042000ABAA heat pump system. These switches protect the compressor by monitoring refrigerant pressure on both the high and low sides of the refrigerant circuit. When either switch fails or trips without resetting, the system enters a safety lockout, short-cycles, or throws a refrigerant pressure fault code — and your unit refuses to run until the condition is corrected.

• Specs — HK02ZA395 (High Side): Open @ 406 PSI | Close @ 300 PSI | 240 VAC | SPST | 1/8" NPT thread | Sensata PS80-03-0018 platform | Replaces: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435
• Specs — HK02ZB038 (Low Side): Open @ 7 PSI | Close @ 22 PSI | 50" leads | Sensata PS80 platform | Factory-matched refrigerant pressure ratings for R-22 or R-410A systems
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact cut-in/cut-out tolerances at the factory. Aftermarket switches frequently carry ±10–15% pressure tolerance, risking nuisance trips, compressor short-cycling, or — more critically — failure to protect the compressor under a true high-pressure fault.
• Install difficulty: 3/5 — Refrigerant-side pressure switches require EPA 608 certification to access the refrigerant circuit. Tools needed: manifold gauge set, 1/8" NPT fittings, needle-nose pliers, multimeter for continuity check before and after install. Always recover refrigerant before removing the high-side switch. Photograph all wiring before disconnecting.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse.

Compatibility: This kit is engineered for the Carrier PH10JA042000ABAA packaged heat pump unit. Always verify your model's data plate and existing pressure ratings before ordering. Our technical team is available to confirm fitment — contact us before you order if you have any questions.