{"product_id":"carrier-ph12na036000aaaa-pressure-switch-jrhhvr","title":"OEM Carrier Pressure Switch 22#CLS 7#OPN 50\" Leads — PH12NA036000AAAA","description":"\u003ch1\u003eOEM Carrier Pressure Switch HK02ZB038 for Model PH12NA036000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM factory-specified pressure switch (part number \u003cstrong\u003eHK02ZB038\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH12NA036000AAAA\u003c\/strong\u003e packaged unit. The pressure switch is a safety device that proves the inducer motor is creating adequate draft before allowing the ignition sequence to begin. When this switch fails — either stuck open or failing to close — the control board cannot advance past the inducer stage, resulting in a no-heat lockout condition. Symptoms include the inducer running continuously with no ignition attempt, or an error code indicating a pressure switch fault.\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 | Factory-matched OEM pressure setpoints | Single-port design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HK02ZB038 is calibrated to Carrier's exact W.C. setpoints (22# close \/ 7# open). Off-brand switches with wider tolerances can cause nuisance lockouts or, worse, allow the furnace to fire under unsafe draft conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Power down the unit before servicing. Tools needed: 1\/4\" nut driver, needle-nose pliers, and a manometer to verify draft pressure if diagnosing. Disconnect the vacuum tubing and two electrical terminals, swap the switch, and confirm the lead tube seats fully before restarting.\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 stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for \u003cstrong\u003eCarrier model PH12NA036000AAAA\u003c\/strong\u003e. Always verify the W.C. rating on your existing switch before ordering — mismatched setpoints can cause recurring lockouts. Our parts team is available to confirm fitment before you buy. \u003cstrong\u003eOrder before 3 PM and your part ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641957601651,"sku":"CARRIE-PH12NA036000AAAA-PRESSURE_SWITCH-HK02ZB038","price":57.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641957634419,"sku":"CARRIE-PH12NA036000AAAA-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_d3352ea7-5303-41b6-97df-81a7fedc43db.jpg?v=1775036940","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na036000aaaa-pressure-switch-jrhhvr","provider":"National HVAC Parts","version":"1.0","type":"link"}