{"product_id":"carrier-ph1pna042000abba-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch 406\/300# for PH1PNA042000ABBA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA395 — 406\/300# for Model PH1PNA042000ABBA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM high pressure safety switch for the \u003cstrong\u003eCarrier PH1PNA042000ABBA\u003c\/strong\u003e packaged heat pump unit. The high pressure switch continuously monitors refrigerant pressure on the high side of the refrigeration circuit. When system pressure exceeds the factory cutout threshold — caused by a blocked condenser coil, failed condenser fan motor, refrigerant overcharge, or loss of airflow — the switch opens to shut down the compressor and protect it from catastrophic damage. When this switch fails or trips and will not reset, the system will lock out on a high pressure fault, leaving you with no cooling or heating. Replacing it with a genuine OEM part ensures factory-accurate pressure setpoints and long-term reliability.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens at 395 PSI | Closes at 295 PSI | 240 VAC | 6(6)A | 1\/8\" NPT thread connection | Sensata PS80-03-0018 body | Part No. HK02ZA395\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM switches are factory-calibrated to exact cutout and cut-in pressures. Aftermarket units can carry wider tolerances, risking nuisance trips or — worse — allowing over-pressure events that shorten compressor life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always recover refrigerant and depressurize the system before replacing any refrigerant-circuit pressure switch. Tools needed: refrigerant recovery machine, 1\/8\" NPT thread sealant (non-hardening), adjustable wrench, multimeter. Confirm the new switch continuity before recharging. A licensed HVAC technician is required for refrigerant handling in most jurisdictions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock — ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for \u003cstrong\u003eCarrier PH1PNA042000ABBA\u003c\/strong\u003e packaged heat pump units. This part also cross-references to legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, 19240027, HK02ZA400, 312926-225, 312926-226, and HK02ZA401 — always verify the open\/close pressure rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641613373811,"sku":"CARRIE-PH1PNA042000ABBA-PRESSURE_SWITCH-HK02ZA395","price":85.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641613406579,"sku":"CARRIE-PH1PNA042000ABBA-PRESSURE_SWITCH-HK02ZA395-GEN","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_7085e11d-ce73-4f44-a203-ae12de11d3b6.jpg?v=1775033426","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1pna042000abba-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}