{"product_id":"carrier-py1rpa060074aawa-pressure-switch-jri7yl","title":"OEM Carrier High Pressure Switch 448#\/327# for PY1RPA060074AAWA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 448#\/327# for Model PY1RPA060074AAWA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier high pressure switch (part numbers \u003cstrong\u003eHK02ZA442\u003c\/strong\u003e and \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e) is the factory-specified refrigerant-side safety switch for the \u003cstrong\u003eCarrier PY1RPA060074AAWA\u003c\/strong\u003e packaged heat pump unit. Mounted in the high-side refrigerant circuit, the switch continuously monitors system pressure and opens the control circuit any time pressure exceeds the factory set point — protecting the compressor from catastrophic damage caused by refrigerant overcharge, restricted airflow, or a blocked condenser coil. When this switch fails or trips and won't reset, the unit will refuse to run in cooling mode, or it may short-cycle immediately after startup. A faulty switch is also a common cause of nuisance lockouts that clear on a manual reset only to return within minutes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens at \u003cstrong\u003e448 PSI\u003c\/strong\u003e | Closes at \u003cstrong\u003e327 PSI\u003c\/strong\u003e | High-side refrigerant pressure switch | OEM part numbers: HK02ZA442 \/ HK02ZB044 | Replaces HK02ZA439\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM switch, factory-calibrated to exact cut-out and cut-in pressure tolerances. Aftermarket switches often carry wider pressure tolerances, which can allow dangerous over-pressure conditions to go unchecked or cause nuisance trips — neither is acceptable for a safety-critical component.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side work requires an EPA Section 608 certified technician. System must be recovered before switch replacement. Tools needed: manifold gauge set, refrigerant recovery machine, adjustable wrench, leak detector. Always verify pressure readings after recharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for the \u003cstrong\u003eCarrier PY1RPA060074AAWA\u003c\/strong\u003e packaged heat pump. Always verify your unit's existing switch pressure ratings against your data plate before ordering. Our fitment specialists are available to confirm compatibility — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640651829619,"sku":"CARRIE-PY1RPA060074AAWA-PRESSURE_SWITCH-HK02ZA442","price":136.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640651862387,"sku":"CARRIE-PY1RPA060074AAWA-PRESSURE_SWITCH-HK02ZA442-GEN","price":120.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA442_e20c24a6-604b-4a1f-afff-b0de3a0ced50.jpg?v=1775033429","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rpa060074aawa-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}