{"product_id":"carrier-py1rea048115aawb-pressure-switch-jri7yl","title":"OEM Carrier High Pressure Switch 448#OPN\/327#CLS — PY1REA048115AAWB","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 448#OPN \/ 327#CLS for Model PY1REA048115AAWB\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM high pressure switch (part number \u003cstrong\u003eHK02ZA442\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PY1REA048115AAWB\u003c\/strong\u003e packaged unit. The high pressure switch is a critical refrigerant-circuit safety device that monitors system discharge pressure. When refrigerant pressure rises beyond the factory-set limit, the switch opens the circuit to protect the compressor from catastrophic damage. Symptoms of a failed high pressure switch include nuisance high-pressure lockouts, the unit shutting off shortly after startup, or a system that will not call for cooling at all. A companion low pressure switch (\u003cstrong\u003eHK02ZB044\u003c\/strong\u003e) is also available and frequently replaced at the same time.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens at 448 PSI | Closes at 327 PSI | 24V control circuit compatible | Factory-matched trip and reset points | OEM Part Numbers: HK02ZA442 (High Pressure), HK02ZB044 (Low Pressure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM part, manufactured to exact factory pressure tolerances. Aftermarket pressure switches frequently carry wider trip-point tolerances, which can lead to compressor damage from undetected over-pressure conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side component. EPA 608 certification required to recover\/recharge refrigerant if the switch is in the high-side line. Tools needed: manifold gauge set, service wrench, multimeter to confirm continuity after swap. Always verify system pressure before reinstalling panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier PY1REA048115AAWB\u003c\/strong\u003e packaged unit. Replaces OEM part number HK02ZA439. Verify the pressure rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — call or chat today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640733225331,"sku":"CARRIE-PY1REA048115AAWB-PRESSURE_SWITCH-HK02ZA442","price":132.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640733258099,"sku":"CARRIE-PY1REA048115AAWB-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_fd31721c-cf95-4bf3-8fdb-9f4e728033fb.jpg?v=1775033446","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rea048115aawb-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}