{"product_id":"carrier-ph12na030000acaa-pressure-switch-jrhhvr","title":"OEM Carrier Pressure Switch 22#CLS 7#OPN 50\" Leads — PH12NA030000ACAA","description":"\u003ch1\u003eOEM Carrier Pressure Switch HK02ZB038 for Model PH12NA030000ACAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement pressure switch for the \u003cstrong\u003eCarrier PH12NA030000ACAA\u003c\/strong\u003e. The pressure switch monitors inducer motor operation by proving negative pressure before the ignition sequence can proceed. When it fails or sticks open, the control board receives no proof-of-draft signal and locks out the system — typically before the gas valve ever opens. Common symptoms include a furnace that attempts to fire but shuts down immediately, a blinking fault code indicating an open pressure switch, or a unit that runs the inducer but never advances to ignition.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Closes at 22\" W.C. | Opens at 7\" W.C. | 50\" lead wire | OEM part number HK02ZB038 | Factory-calibrated setpoints for Carrier PH12NA030000ACAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM part — factory-calibrated to exact W.C. setpoints. Aftermarket pressure switches often drift ±10–15% from rated setpoints, causing nuisance lockouts or, worse, failing to prove draft when the inducer is actually faulty.\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, needle-nose pliers, small flathead screwdriver. Remove the hose from the old switch, note the port orientation, and connect the single hose to the new switch. Swap the two low-voltage wires directly. No soldering required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty against defects. 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 Direct OEM replacement for \u003cstrong\u003eCarrier model PH12NA030000ACAA\u003c\/strong\u003e. Always verify the W.C. rating printed on your existing switch before ordering — multiple pressure switch variants exist across the PH12NA series. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order. \u003cstrong\u003eIn stock — order now and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641960714611,"sku":"CARRIE-PH12NA030000ACAA-PRESSURE_SWITCH-HK02ZB038","price":57.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641960747379,"sku":"CARRIE-PH12NA030000ACAA-PRESSURE_SWITCH-HK02ZB038-GEN","price":50.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZB038_c8a89dfb-aba9-4492-86de-add5991d04f4.jpg?v=1775036935","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na030000acaa-pressure-switch-jrhhvr","provider":"National HVAC Parts","version":"1.0","type":"link"}