OEM Carrier High Pressure Switch HK02ZA395 / HK02ZB044 for Model PH1ZEA060000ABAA

This OEM Carrier high pressure switch (part number HK02ZA395) is the factory-specified refrigerant-side safety switch for the Carrier PH1ZEA060000ABAA heat pump package unit. The switch continuously monitors high-side refrigerant pressure and opens the safety circuit when pressure exceeds the rated threshold, protecting the compressor from catastrophic overpressure failure. When this switch fails or trips on nuisance faults, you'll typically see the system locking out on a high-pressure fault code, short-cycling, or shutting down entirely during peak cooling or heating demand. The companion low-pressure switch HK02ZB044 is also available and covers the low-side refrigerant circuit on the same platform.

• Specs — HK02ZA395: High Pressure Safety Switch | Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread | Sensata PS80-03-0018 platform | 240 VAC rated | Factory OEM tolerance
• Specs — HK02ZB044: Low Pressure Switch | Opens at 7 PSI | Closes at 22 PSI | 50" lead wires | 24V | Manufactured in Mexico | OEM drop-in replacement
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact factory setpoints. Aftermarket alternatives frequently carry wider pressure tolerances, which can allow the compressor to operate outside safe limits — accelerating wear or causing premature failure. Always use OEM on refrigerant-side safety circuits.
• Install difficulty: 3/5 — System must be recovered or pressure equalized before replacing high-pressure switch. Tools needed: refrigerant manifold gauges, 1/2" open-end wrench, PTFE thread tape, multimeter for continuity check. Confirm Schrader cap is reinstalled after switch replacement. Low-pressure switch swap is simpler but requires the same pressure-equalization protocol.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse. Free ground shipping on orders over $99.

Compatibility: Engineered for the Carrier PH1ZEA060000ABAA packaged heat pump unit. HK02ZA395 replaces legacy part numbers including 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, and HK02ZA435. Verify refrigerant circuit type and PSI setpoints on your unit's data plate before ordering. Our HVAC specialists are available to confirm fitment — contact us before you buy.