{"product_id":"carrier-ph1ppb030000aaaa-pressure-switch-jria74","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH1PPB030000AAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — HK02ZA395 \u0026amp; HK02ZB044 for Model PH1PPB030000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003eHK02ZA395 High Pressure Switch\u003c\/strong\u003e and the \u003cstrong\u003eHK02ZB044 Low Pressure Switch\u003c\/strong\u003e, the factory-specified safety controls for the \u003cstrong\u003eCarrier PH1PPB030000AAAA\u003c\/strong\u003e packaged heat pump unit. Together, these switches continuously monitor refrigerant circuit pressure — the high-side switch opens at 395 PSI to protect the compressor from dangerously elevated discharge pressure, while the low-side switch opens at 7 PSI to guard against refrigerant loss and loss-of-charge conditions. When either switch fails or trips and won't reset, the system will go into lockout mode, delivering no heating or cooling. Common symptoms include a system that starts briefly then shuts down, a compressor that won't engage, or a fault code indicating a pressure trip on your thermostat or control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZA395:\u003c\/strong\u003e High Pressure Safety Switch | Open: 395 PSI | Close: 295 PSI | 240 VAC | 1\/8\" NPT Thread | Sensata PS80-03-0018 | Replaces: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZB044:\u003c\/strong\u003e Low Pressure Cutout Switch | Open: 7 PSI | Close: 22 PSI | 24V | 50\" Lead | OEM Carrier\/Bryant\/Payne\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Both switches are genuine Carrier OEM parts manufactured to factory-exact setpoints. Aftermarket pressure switches frequently carry wider trip tolerances, risking nuisance trips or — more critically — failure to protect the compressor under true fault conditions, leading to costly compressor replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires EPA 608 certification. Always recover refrigerant before accessing high-side ports. Tools needed: manifold gauge set, 1\/4\" and 3\/8\" flare wrenches, multimeter for continuity check, and leak detection solution. Photograph all wiring before disconnecting. Low-side switch swap on the control circuit side is straightforward for experienced technicians.\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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-matched for the Carrier \u003cstrong\u003ePH1PPB030000AAAA\u003c\/strong\u003e packaged heat pump unit. The HK02ZA395 is also a known cross-reference for numerous Carrier, Bryant, and Payne split and packaged systems — always verify PSI setpoints against your unit's data plate or wiring diagram before installing. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us today and ship the same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641562878323,"sku":"CARRIE-PH1PPB030000AAAA-PRESSURE_SWITCH-HK02ZA395","price":90.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641562911091,"sku":"CARRIE-PH1PPB030000AAAA-PRESSURE_SWITCH-HK02ZA395-GEN","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_323d8ce5-8fc5-46cd-a380-397586313355.jpg?v=1775033134","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1ppb030000aaaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}