{"product_id":"carrier-py1rpa036074abwa-pressure-switch-jri7yl","title":"OEM Carrier High Pressure Switch HK02ZA442 for PY1RPA036074ABWA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA442 for Model PY1RPA036074ABWA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch (part number \u003cstrong\u003eHK02ZA442\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY1RPA036074ABWA\u003c\/strong\u003e packaged rooftop unit. The high pressure switch monitors refrigerant circuit pressure on the high side and cuts out the compressor when pressure exceeds safe operating limits — protecting the compressor from catastrophic over-pressure failure. When this switch fails or trips, the system will typically short-cycle, lock out on a high-pressure fault, or refuse to enter the cooling mode entirely. A nuisance trip that won't reset manually is the most common field complaint.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 448 PSI opening pressure | 327 PSI closing pressure | SPST normally closed | Factory Authorized Part — meets exact Carrier Corporation tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso included \/ related:\u003c\/strong\u003e This listing pairs with companion low pressure switch \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e (7 PSI open \/ 22 PSI close, 50\" leads) — both switches work in tandem to protect the refrigerant circuit. Replacing both at the same service call is best practice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact cut-in and cut-out tolerances at the factory. Off-brand substitutes frequently drift outside spec, causing nuisance lockouts or — worse — failing to protect the compressor at true over-pressure conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Recover refrigerant per EPA 608 regulations before disconnecting pressure switch leads on the high-side port. Tools needed: manifold gauge set, wire terminals or heat-shrink connectors, multimeter for continuity check. Always confirm the system is in a recovered\/off state before disconnecting wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on all Carrier Factory Authorized Parts. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePY1RPA036074ABWA\u003c\/strong\u003e packaged rooftop unit. Verify your unit's existing switch cut-out pressure rating on the data plate or wiring diagram before ordering. Need fitment confirmed? Our HVAC parts specialists verify compatibility before you buy — contact us today. \u003cstrong\u003eIn stock — order now and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640667591027,"sku":"CARRIE-PY1RPA036074ABWA-PRESSURE_SWITCH-HK02ZA442","price":121.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640667623795,"sku":"CARRIE-PY1RPA036074ABWA-PRESSURE_SWITCH-HK02ZA442-GEN","price":106.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA442_8ab3b844-c18e-4eb8-80d9-764d4d98ebee.jpg?v=1775033645","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rpa036074abwa-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}