{"product_id":"carrier-ph2ppb042000ab-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch HK02ZA395 for PH2PPB042000AB","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA395 \/ HK02ZB044 for Model PH2PPB042000AB\u003c\/h1\u003e\u003cp\u003eThis genuine OEM high pressure switch is the factory-specified replacement for the \u003cstrong\u003eCarrier PH2PPB042000AB\u003c\/strong\u003e heat pump. The high pressure switch monitors refrigerant system pressure on the discharge side of the compressor. When refrigerant pressure exceeds the factory-set cutout threshold, the switch opens the safety circuit — shutting down the compressor to prevent catastrophic damage. A failed or out-of-spec switch causes nuisance high-pressure lockouts, prevents cooling or heating operation, or — if stuck closed — allows dangerously elevated pressures that can destroy the compressor.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens at 395 PSI | Closes at 295 PSI | 240 VAC rated | 1\/8\" NPT thread connection | SPST normally-closed contact | Sensata PS80 platform | OEM Part Numbers: HK02ZA395 (High Pressure Switch) and HK02ZB044 (Pressure Switch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM part manufactured to factory pressure setpoints. Aftermarket switches frequently carry ±5–10% pressure tolerances, which can allow unsafe operating pressures or cause premature nuisance trips — risking compressor damage. OEM is the only specification-correct choice for a safety-critical component.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires system refrigerant recovery before disconnecting. Tools needed: refrigerant recovery machine, manifold gauge set, 1\/8\" NPT thread sealant, adjustable wrench, multimeter for continuity verification. Recommended for certified HVAC technicians only (EPA 608 required).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our warehouse. Free shipping on orders over $99.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Verified for Carrier model \u003cstrong\u003ePH2PPB042000AB\u003c\/strong\u003e heat pump. Also cross-references legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501 — confirm your unit's data plate pressure ratings before ordering. Not sure if this is your part? Our HVAC specialists verify fitment before you buy — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641448714611,"sku":"CARRIE-PH2PPB042000AB-PRESSURE_SWITCH-HK02ZA395","price":71.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641448747379,"sku":"CARRIE-PH2PPB042000AB-PRESSURE_SWITCH-HK02ZA395-GEN","price":63.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_eca73e0b-cf20-43ea-85eb-1b13e591ca1d.jpg?v=1775033607","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph2ppb042000ab-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}