{"product_id":"carrier-py1rea060074aawa-pressure-switch-jri7yl","title":"OEM Carrier High Pressure Switch HK02ZA442 for PY1REA060074AAWA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA442 for Model PY1REA060074AAWA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM high pressure switch for the \u003cstrong\u003eCarrier PY1REA060074AAWA\u003c\/strong\u003e packaged unit. The high pressure switch (HPS) is a critical refrigerant-circuit safety device that continuously monitors discharge-line pressure. When refrigerant pressure climbs above the trip threshold — due to a dirty condenser coil, failed condenser fan motor, overcharge, or restricted airflow — the switch opens the compressor circuit, preventing catastrophic compressor damage. A failed or tripped switch typically causes a hard lockout: the system calls for cooling, the compressor contactor pulls in, and within seconds the unit shuts down on a high-pressure fault code. This OEM part (HK02ZA442) is also sold alongside the companion low pressure switch HK02ZB044, and both are commonly replaced as a protective pair on this platform.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 448 PSI opening pressure | 327 PSI closing pressure (auto-reset) | SPST normally closed | Factory-matched to Carrier refrigerant circuit tolerances | Replaces Carrier part HK02ZA439\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact trip and reset pressures at the factory. Aftermarket alternatives frequently deviate ±10–15 PSI, risking either nuisance trips or — worse — delayed protection that allows compressor overheating. For a high-value scroll compressor platform like the PY1REA060, OEM is the correct choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Recover refrigerant charge before disconnecting the high-side pressure switch. Tools needed: manifold gauge set, refrigerant recovery unit, adjustable wrench, and a multimeter to confirm continuity before recharge. Always verify system pressures after reinstallation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for Carrier model \u003cstrong\u003ePY1REA060074AAWA\u003c\/strong\u003e packaged rooftop units. Companion low pressure switch HK02ZB044 (7 PSI open \/ 22 PSI close, 50\" leads) is available separately. Verify refrigerant type and discharge-line port size on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640726999411,"sku":"CARRIE-PY1REA060074AAWA-PRESSURE_SWITCH-HK02ZA442","price":130.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640727032179,"sku":"CARRIE-PY1REA060074AAWA-PRESSURE_SWITCH-HK02ZA442-GEN","price":114.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA442_87828a0f-b1b5-4da6-a0f4-6140f3caab28.jpg?v=1775033635","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rea060074aawa-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}