{"product_id":"carrier-py2pnb030040nb-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch 395\/295 PSI for PY2PNB030040NB","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 395\/295 PSI — HK02ZA395 for Model PY2PNB030040NB\u003c\/h1\u003e\u003cp\u003eThis factory-authorized OEM high pressure switch (part number \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e) is the direct replacement for the \u003cstrong\u003eCarrier PY2PNB030040NB\u003c\/strong\u003e packaged or split-system unit. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors system discharge pressure and opens the control circuit if pressure exceeds the factory-set cutout threshold, protecting the compressor from catastrophic over-pressure failure. When this switch fails or becomes erratic, you'll typically experience nuisance high-pressure lockouts, compressor short-cycling, or a system that trips on a fault code and requires manual reset — even when refrigerant charge and airflow appear normal.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens at 395 PSI | Closes (auto-reset) at 295 PSI | 240 VAC rated | 1\/8\" NPT thread | Sensata PS80-03-0018 platform | Cross-ref: HK02ZA395A, 406-300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part. OEM switches are factory-calibrated to exact cutout\/reset tolerances — critical for compressor protection. Aftermarket alternatives often carry ±5–10% pressure tolerances, risking either premature trips or under-protection of the compressor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always recover refrigerant and depressurize the system before replacing a high pressure switch. Tools needed: refrigerant recovery unit, adjustable wrench, 1\/8\" NPT thread sealant (PTFE rated for refrigerant), multimeter to confirm continuity at rest. Photograph existing wiring before disconnecting spade terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our NationalHVACParts.com warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePY2PNB030040NB\u003c\/strong\u003e. Also replaces legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, and several other HK02ZA-series switches — always verify PSI ratings on your unit's data plate before ordering. Our team is available to confirm fitment prior to purchase. Order today and get back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640545300851,"sku":"CARRIE-PY2PNB030040NB-PRESSURE_SWITCH-HK02ZA395","price":47.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640545333619,"sku":"CARRIE-PY2PNB030040NB-PRESSURE_SWITCH-HK02ZA395-GEN","price":41.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_f6e1daba-88cb-41b0-a5fa-b7e1804aea7f.jpg?v=1775033296","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb030040nb-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}