{"product_id":"carrier-ph12na030000aaaa-pressure-switch-jrhhvr","title":"OEM Carrier Pressure Switch 7#Open 22#Close — HK02ZB038 PH12NA030000AA","description":"\u003ch1\u003eOEM Carrier Pressure Switch 7#Open \/ 22#Close \/ 50\" Leads for Model PH12NA030000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch (part number \u003cstrong\u003eHK02ZB038\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH12NA030000AAAA\u003c\/strong\u003e packaged heat pump system. The pressure switch monitors refrigerant or system pressure and sends a signal to the control board to allow or interrupt operation. When it fails or sticks open, the unit will typically lock out before or during the heating\/cooling cycle — leaving you with a system that won't start, throws a pressure fault code, or shuts down immediately after attempting to run.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens at 7 PSI | Closes at 22 PSI | 50\" wire leads | Factory-calibrated set points | OEM part number HK02ZB038 (also cross-referenced as PS80-02-F0074)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM switch with precision-calibrated open\/close set points. Generic alternatives often drift outside the ±1 PSI tolerance required for reliable operation, risking nuisance lockouts or missed fault conditions that can damage the compressor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power before servicing. Tools needed: 1\/4\" nut driver or flat-head screwdriver, needle-nose pliers. Note lead wire positions before disconnecting. Typical swap time is under 15 minutes for a qualified technician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePH12NA030000AAAA\u003c\/strong\u003e packaged heat pump unit. Always verify your unit's data plate and wiring diagram to confirm the switch set points match before installing. Cross-reference: PS80-02-F0074. Need help confirming fitment? Our HVAC parts specialists are standing by — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641961501043,"sku":"CARRIE-PH12NA030000AAAA-PRESSURE_SWITCH-HK02ZB038","price":57.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641961533811,"sku":"CARRIE-PH12NA030000AAAA-PRESSURE_SWITCH-HK02ZB038-GEN","price":50.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZB038_5aec648c-13d4-4cb0-b685-6ee6285414f4.jpg?v=1775037117","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na030000aaaa-pressure-switch-jrhhvr","provider":"National HVAC Parts","version":"1.0","type":"link"}