{"product_id":"carrier-ch14na04800gaaaa-pressure-switch-1vlc9v","title":"OEM Carrier Pressure Switch High\/Low for CH14NA04800GAAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch for Model CH14NA04800GAAAA\u003c\/h1\u003e\u003cp\u003eThese OEM pressure switches — \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 CH14NA04800GAAAA\u003c\/strong\u003e condensing unit. Pressure switches monitor the inducer motor's draft pressure via a rubber hose connected to the flue or collector box. When either switch fails to close at the correct water-column (W.C.) rating, the control board never advances past the inducer prove stage, resulting in a no-heat lockout with no ignition attempt. A cracked hose, stuck diaphragm, or out-of-spec switch are the most common culprits.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e \u003cstrong\u003e312926-252\u003c\/strong\u003e — High Pressure Switch | \u003cstrong\u003e312926-258\u003c\/strong\u003e — Low Pressure Switch | Factory-calibrated W.C. rating | Single-pole normally-open (SPNO) design | 1\/4\" spade terminals | Matched to inducer airflow specifications for Carrier CH14NA04800GAAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to exact W.C. setpoints for this model. Generic alternatives frequently carry wide tolerance bands that cause nuisance lockouts or, worse, fail to detect a true draft fault — a potential safety hazard with gas appliances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off power and gas before beginning. Tools needed: 1\/4\" nut driver, needle-nose pliers, and a manometer (optional, for verification). Disconnect the rubber sensing hose and two spade terminals, swap the switch, and confirm the hose is free of cracks or blockages before reassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003eCarrier CH14NA04800GAAAA\u003c\/strong\u003e condensing unit. Always verify part numbers \u003cstrong\u003e312926-252\u003c\/strong\u003e and \u003cstrong\u003e312926-258\u003c\/strong\u003e against your unit's wiring diagram or data plate before ordering. If you are unsure which switch has failed — high or low — our parts team can help diagnose before you buy. Order now and get same-day shipping on in-stock OEM Carrier pressure switches.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909615243635,"sku":"CARRIE-CH14NA04800GAAAA-PRESSURE_SWITCH-312926-252","price":27.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909615276403,"sku":"CARRIE-CH14NA04800GAAAA-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_4325ea26-ae01-481b-87a2-b44d687c1876.jpg?v=1782930527","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch14na04800gaaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}