{"product_id":"carrier-py1rja060115aawa-pressure-switch-jri7yl","title":"OEM Carrier High Pressure Switch 448\/327 PSI — PY1RJA060115AAWA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA442 \/ HK02ZB044 for Model PY1RJA060115AAWA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch is the factory-specified replacement for the \u003cstrong\u003eCarrier PY1RJA060115AAWA\u003c\/strong\u003e packaged unit. The high-side pressure switch (HK02ZA442) continuously monitors refrigerant circuit pressure and opens the safety circuit when system pressure exceeds safe operating thresholds, protecting the compressor from catastrophic damage. A failed high pressure switch typically causes the system to lock out immediately on startup, trip on high-pressure fault codes, or prevent the compressor from energizing altogether. The companion low pressure switch (HK02ZB044) monitors suction-side pressure and shuts down the system if refrigerant loss or airflow restriction causes dangerously low pressures. Both switches are watertight, auto-reset safety devices built to Carrier's exact factory specification.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZA442 (High Pressure Switch):\u003c\/strong\u003e 448 PSI opening pressure | 327 PSI closing pressure | Auto-reset | Replaces HK02ZA439\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZB044 (Low Pressure Switch):\u003c\/strong\u003e 7 PSI opening pressure | 22 PSI closing pressure | 50\" lead | 24V control circuit | Auto-reset\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 switches often have wider pressure tolerances, risking nuisance trips or — more dangerously — failure to protect the compressor at the correct threshold, shortening compressor life significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires recovering refrigerant before accessing high-side ports on HK02ZA442. Tools needed: manifold gauge set, refrigerant recovery equipment, 1\/4\" and 3\/8\" wrenches, multimeter. Always verify switch continuity before condemning. Low-side switch (HK02ZB044) is more accessible but still requires system depressurization for safe replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Ships same business day from our warehouse stock.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for \u003cstrong\u003eCarrier model PY1RJA060115AAWA\u003c\/strong\u003e packaged units. Verify your unit's data plate and existing switch PSI ratings before ordering. Our fitment team is available to confirm compatibility before you buy — call or chat today. In stock and ready to ship.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640670409075,"sku":"CARRIE-PY1RJA060115AAWA-PRESSURE_SWITCH-HK02ZA442","price":132.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640670441843,"sku":"CARRIE-PY1RJA060115AAWA-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_e0a6ed25-9b87-4944-b748-fa605701f67c.jpg?v=1775033465","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rja060115aawa-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}