{"product_id":"carrier-ph1zpa036000aaaa-pressure-switch-jria74","title":"OEM Carrier Pressure Switch Kit HK02ZA395 \u0026 HK02ZB044 — PH1ZPA036000AA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Set HK02ZA395 + HK02ZB044 for Model PH1ZPA036000AAAA\u003c\/h1\u003e\u003cp\u003eThis factory-matched OEM pressure switch kit includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB044)\u003c\/strong\u003e designed as direct replacements for the \u003cstrong\u003eCarrier PH1ZPA036000AAAA\u003c\/strong\u003e packaged heat pump unit. Pressure switches are critical safety devices that monitor refrigerant pressure and shut the system down before compressor damage can occur. When either switch fails — or trips and won't reset — the result is a system that locks out, won't start, or short-cycles within seconds of calling for cooling or heating.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZA395 (High Pressure Switch):\u003c\/strong\u003e Opens at 395 PSI | Closes at 295 PSI | 240 VAC | 1\/8\" NPT thread | Replaces 312926-217, HK02ZA380, HK02ZA396, and other legacy Carrier part numbers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZB044 (Low Pressure Switch):\u003c\/strong\u003e Opens at 7 PSI | Closes at 22 PSI | 24V | 50\" lead wire | OEM Carrier\/Bryant\/Payne application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory trip points. Aftermarket alternatives often carry wider tolerances that can allow damaging over- or under-pressure conditions to go undetected, shortening compressor life significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Recover refrigerant before accessing the refrigerant circuit side. De-energize the unit at the disconnect before any work. Tools needed: refrigerant recovery machine, manifold gauges, 1\/4\" nut driver, needle-nose pliers. Always photograph existing wiring before disconnecting leads. Verify trip-point markings match your unit's data plate before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders ship same business day from our warehouse when placed before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This kit is the OEM-specified replacement for \u003cstrong\u003eCarrier model PH1ZPA036000AAAA\u003c\/strong\u003e packaged heat pump units. Confirm both part numbers against your unit's wiring diagram and data plate before ordering. Not sure? Our HVAC parts specialists verify fitment before you purchase — reach out via chat or phone.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641502683507,"sku":"CARRIE-PH1ZPA036000AAAA-PRESSURE_SWITCH-HK02ZA395","price":90.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641502716275,"sku":"CARRIE-PH1ZPA036000AAAA-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_89e6508a-65ac-4b8a-b144-6f61e592d786.jpg?v=1775038411","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1zpa036000aaaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}