{"product_id":"carrier-ph10ja03000gahaa-pressure-switch-jrhhvr","title":"OEM Carrier Pressure Switch 22#CLS 7#OPN 50\" Leads — PH10JA03000GAHAA","description":"\u003ch1\u003eOEM Carrier Pressure Switch 22#CLS \/ 7#OPN 50\" Leads for Model PH10JA03000GAHAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier pressure switch (part number \u003cstrong\u003eHK02ZB038\u003c\/strong\u003e), factory-specified for the \u003cstrong\u003eCarrier PH10JA03000GAHAA\u003c\/strong\u003e packaged unit. The pressure switch is a critical safety component that monitors the inducer motor's negative pressure to prove proper venting before allowing the ignition sequence to proceed. When this switch fails or becomes stuck open, the control board will not advance past the inducer stage — resulting in a no-heat lockout condition. Common symptoms include: the inducer motor running continuously with no ignition, fault codes indicating a pressure switch failure, or the system cycling off immediately after the call for heat begins.\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 length | SPST normally open configuration | Factory-matched pressure rating for PH10JA03000GAHAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM part manufactured to exact factory pressure tolerances. Aftermarket switches frequently carry ±5–10% W.C. variance, which can cause nuisance lockouts or — more dangerously — fail to detect true venting problems. OEM is the only safe choice for pressure-proving components.\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, and a manometer (recommended to verify switch actuation pressure post-install). Swap the two leads and single hose port, then restore power and test on a call for heat.\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 cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct OEM replacement for \u003cstrong\u003eCarrier model PH10JA03000GAHAA\u003c\/strong\u003e. Always verify the W.C. rating on your existing switch before ordering — mismatched pressure ratings are a common source of repeated lockouts. Not sure it fits? Our HVAC parts team will verify fitment before you order. \u003cstrong\u003eIn stock — order now and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642006098291,"sku":"CARRIE-PH10JA03000GAHAA-PRESSURE_SWITCH-HK02ZB038","price":57.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642006131059,"sku":"CARRIE-PH10JA03000GAHAA-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_c474775a-cb91-4cd9-a576-af782f449223.jpg?v=1775036861","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph10ja03000gahaa-pressure-switch-jrhhvr","provider":"National HVAC Parts","version":"1.0","type":"link"}