{"product_id":"carrier-ch14na02400gaaaa-pressure-switch-1vlc9v","title":"OEM Carrier Pressure Switch High\/Low for CH14NA02400GAAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch for Model CH14NA02400GAAAA\u003c\/h1\u003e\u003cp\u003eThese OEM pressure switches — part numbers \u003cstrong\u003e312926-252 (High Pressure Switch)\u003c\/strong\u003e and \u003cstrong\u003e312926-258 (Low Pressure Switch)\u003c\/strong\u003e — are the factory-specified replacements for the \u003cstrong\u003eCarrier CH14NA02400GAAAA\u003c\/strong\u003e condensing unit. Pressure switches prove that the inducer motor is creating adequate draft before allowing the ignition sequence to proceed. When either switch fails or sticks open, the control board locks out the system before a single ignition attempt is made, leaving you with no heat and typically a diagnostic fault code pointing to inducer or draft proving failure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 312926-252 — High Pressure Switch | 312926-258 — Low Pressure Switch | Factory-calibrated W.C. (water column) rating | SPST normally-open configuration | Direct OEM fit, no modification required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact W.C. specifications required by your unit's venting design. Generic substitutes often carry wider tolerances that can cause nuisance lockouts or, worse, allow ignition under unsafe draft conditions — always choose OEM for safety-critical components like pressure switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and gas supply before beginning. Tools needed: 1\/4\" nut driver, flathead screwdriver, manometer (recommended for verification), and zip ties for hose management. Photograph all tubing connections before removal to ensure correct reassembly of the pressure ports.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders placed before our same-day cutoff ship the same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits Carrier model \u003cstrong\u003eCH14NA02400GAAAA\u003c\/strong\u003e condensing units. Verify your existing pressure switch part number (printed on the switch body label) against 312926-252 or 312926-258 before ordering to confirm high or low switch replacement. If you are unsure which switch has failed, our technical team can help diagnose via fault code before you order — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909617570163,"sku":"CARRIE-CH14NA02400GAAAA-PRESSURE_SWITCH-312926-252","price":27.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909617602931,"sku":"CARRIE-CH14NA02400GAAAA-PRESSURE_SWITCH-312926-252-GEN","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-draft-inducer-312926-252_21acd9e3-e380-438a-9eb9-790b514b6fea.jpg?v=1782930522","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch14na02400gaaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}