{"product_id":"carrier-py2pnb030040aa-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch 395\/295 PSI for PY2PNB030040AA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 395\/295 PSI — HK02ZA395 for Model PY2PNB030040AA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch (part number \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e) is the factory-specified refrigerant safety switch for the \u003cstrong\u003eCarrier PY2PNB030040AA\u003c\/strong\u003e heat pump system. Manufactured by Sensata, this SPST pressurestat continuously monitors refrigerant circuit pressure and opens the safety circuit when system pressure exceeds the factory set limit, protecting the compressor from catastrophic high-side failure. Common failure symptoms include nuisance high-pressure lockouts, the system short-cycling immediately after startup, or the unit shutting down with a high-pressure fault code even when refrigerant charge appears normal — often caused by a switch that has drifted out of calibration or a failed internal diaphragm.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens at 395 PSI | Closes at 295 PSI | SPST configuration | 24V \/ 2A rated | 42\" lead length | Quick-connect electrical termination | 1\/8\"-NPT fine thread refrigerant port | Manufacturer: Sensata (Carrier Factory Authorized)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM Carrier pressurestat is factory-calibrated to open and close at exact PSI thresholds. Off-brand alternatives frequently exhibit ±5–10% pressure variance, risking either nuisance trips or — more dangerously — failing to open during a true high-pressure event and allowing compressor damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Requires recovery of system refrigerant charge before replacing the switch. Tools needed: refrigerant recovery unit, manifold gauge set, adjustable wrench or 1-1\/16\" open-end wrench, multimeter for continuity verification. Always photograph wiring and tag leads before disconnecting. EPA 608 certification required for refrigerant handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 Carrier model \u003cstrong\u003ePY2PNB030040AA\u003c\/strong\u003e. Also supersedes legacy Carrier\/ICP part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Verify refrigerant port thread size and PSI rating on your unit's data plate before ordering. Not sure if this is the right switch? Our HVAC parts specialists verify fitment before you order — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640546414963,"sku":"CARRIE-PY2PNB030040AA-PRESSURE_SWITCH-HK02ZA395","price":92.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640546447731,"sku":"CARRIE-PY2PNB030040AA-PRESSURE_SWITCH-HK02ZA395-GEN","price":81.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_88d4b2d7-27c5-4f34-ae97-e548133c7b75.jpg?v=1775033294","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb030040aa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}