{"product_id":"carrier-ph1ppb036000aaaa-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch HK02ZA395 for PH1PPB036000AAAA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA395 \/ HK02ZB044 for Model PH1PPB036000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement high pressure switch for the \u003cstrong\u003eCarrier PH1PPB036000AAAA\u003c\/strong\u003e packaged heat pump unit. The pressure switch is a critical safety and sequencing component that proves the inducer motor has created sufficient negative pressure (draft) before allowing the gas valve to open. When this switch fails or sticks open, the control board cannot verify safe venting conditions — resulting in a hard lockout, no-ignition fault codes, or a system that attempts a call for heat but shuts down before the burner ever fires. Two OEM part numbers are associated with this unit: \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e (High Pressure Switch) and \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e (Pressure Switch) — verify against your unit's wiring diagram or control board label to confirm which switch position you are replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM-rated water column (W.C.) trip point | Single-port or dual-port hose barb (verify on data plate) | 24V control circuit compatible | Factory-calibrated for Carrier PH1PPB036000AAAA packaged unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to exact W.C. specifications for this unit. Off-brand substitutes with incorrect trip points can cause nuisance lockouts, failed ignition sequences, or — more dangerously — allow ignition under unsafe draft conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power before servicing. Tools needed: 1\/4\" nut driver, flathead screwdriver, manometer (recommended to verify W.C. after install). Inspect rubber hose connections for cracks before reinstalling tubing. Always clear fault codes after replacement.\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 warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-matched for \u003cstrong\u003eCarrier model PH1PPB036000AAAA\u003c\/strong\u003e packaged heat pump systems. Cross-reference OEM part numbers \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e and \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e against your unit's service label to confirm the correct switch position. Not sure which one you need? Contact our HVAC parts specialists — we verify fitment before you order and ship same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641562026355,"sku":"CARRIE-PH1PPB036000AAAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641562059123,"sku":"CARRIE-PH1PPB036000AAAA-PRESSURE_SWITCH-HK02ZA395-GEN","price":38.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_858a998e-fe21-44aa-ba26-485c8c659b05.jpg?v=1775033568","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1ppb036000aaaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}