{"product_id":"carrier-ch13na04900gabaa-pressure-switch-1vlc9v","title":"OEM Carrier Pressure Switch High\/Low for CH13NA04900GABAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch for Model CH13NA04900GABAA\u003c\/h1\u003e\u003cp\u003eThese are the factory OEM replacement pressure switches for the \u003cstrong\u003eCarrier CH13NA04900GABAA\u003c\/strong\u003e gas furnace — available as the \u003cstrong\u003eHigh Pressure Switch (OEM# 312926-252)\u003c\/strong\u003e and \u003cstrong\u003eLow Pressure Switch (OEM# 312926-258)\u003c\/strong\u003e. Pressure switches are safety devices that prove the inducer motor is creating adequate draft before allowing the ignition sequence to proceed. When either switch fails — or when a blocked flue, cracked hose, or weak inducer causes it to trip — the furnace will lock out prior to ignition, often displaying a fault code and leaving your home without heat. Symptoms include the inducer starting normally but the heating cycle never advancing to igniter warm-up.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High Pressure Switch OEM# 312926-252 | Low Pressure Switch OEM# 312926-258 | Factory-calibrated water column (W.C.) set point | Single-pole normally open contacts | Designed for induced-draft gas furnace application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to the exact W.C. rating specified by Carrier engineering. Generic substitutes frequently drift outside acceptable set-point tolerance, causing nuisance lockouts or — more dangerously — failing to trip when combustion venting is compromised.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting the rubber hose port, two electrical spade terminals, and one or two mounting screws. Tools needed: flathead screwdriver, needle-nose pliers, manometer (recommended to verify set point), and multimeter to confirm continuity at correct pressure. Always disconnect power at the breaker before servicing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e Backed by a 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse — so your repair doesn't wait.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e These pressure switches are factory-specified for the \u003cstrong\u003eCarrier CH13NA04900GABAA\u003c\/strong\u003e induced-draft gas furnace. Confirm whether you need the high-stage switch (312926-252) or low-stage switch (312926-258) by referencing your furnace's wiring diagram or existing part label before ordering. If you're unsure which switch applies to your fault code, our parts team can verify fitment before you buy. In stock and ready to ship today — get your furnace back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909624713587,"sku":"CARRIE-CH13NA04900GABAA-PRESSURE_SWITCH-312926-252","price":27.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909624746355,"sku":"CARRIE-CH13NA04900GABAA-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-pressure-switch-single-312926-252_f66f7a5d-fad2-4984-8f59-2c0e6fcf93d8.jpg?v=1782930512","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch13na04900gabaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}