{"product_id":"carrier-py1rpa048074aawb-pressure-switch-jri7yl","title":"OEM Carrier High Pressure Switch 448#OPN 327#CLS — PY1RPA048074AAWB","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 448#OPN \/ 327#CLS for Model PY1RPA048074AAWB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier high pressure switch (part number \u003cstrong\u003eHK02ZA442\u003c\/strong\u003e) factory-specified for the \u003cstrong\u003eCarrier PY1RPA048074AAWB\u003c\/strong\u003e packaged unit. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors refrigerant discharge pressure and opens the circuit to shut down the compressor if pressure exceeds the trip point. When it fails or trips, you'll typically see nuisance high-pressure lockouts, compressor short-cycling, or a system that won't run at all even when refrigerant charge and airflow are verified normal. This listing also includes the companion low pressure switch \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e (7#OPN \/ 22#CLS, 50\" leads), which protects the low side of the refrigerant circuit — together these two switches provide complete factory refrigerant-circuit pressure protection for the PY1RPA048074AAWB.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs (HK02ZA442 — High Pressure Switch):\u003c\/strong\u003e Opening pressure: 448 PSI | Closing pressure: 327 PSI | OEM part replaces HK02ZA439 | Made in Mexico | Factory-matched trip tolerances for reliable compressor protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs (HK02ZB044 — Low Pressure Switch):\u003c\/strong\u003e Opening pressure: 7 PSI | Closing pressure: 22 PSI | 50\" lead wire | 24V control circuit | OEM Carrier\/Bryant\/Payne genuine part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory trip points. Aftermarket units frequently deviate from rated open\/close pressures, allowing unsafe operating conditions that shorten compressor life or create refrigerant circuit damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires EPA 608 certification. Discharge system pressure before disconnecting. Tools needed: manifold gauge set, 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph wiring before removal. Always verify system charge and airflow before condemning pressure switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders placed by 3PM ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e These switches are the factory-specified OEM replacements for the \u003cstrong\u003eCarrier PY1RPA048074AAWB\u003c\/strong\u003e packaged unit. Verify part numbers against your unit's wiring diagram and data plate before ordering. Not sure about fitment? Our HVAC parts specialists will confirm compatibility before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640662806899,"sku":"CARRIE-PY1RPA048074AAWB-PRESSURE_SWITCH-HK02ZA442","price":132.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640662839667,"sku":"CARRIE-PY1RPA048074AAWB-PRESSURE_SWITCH-HK02ZA442-GEN","price":116.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA442_4832fe90-ddd1-4be7-8b6f-8d0e41372b0c.jpg?v=1775033438","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rpa048074aawb-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}