{"product_id":"carrier-ch14nb03600gabaa-pressure-switch-1vlc9v","title":"OEM Carrier Pressure Switch High\/Low for CH14NB03600GABAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch for Model CH14NB03600GABAA\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 CH14NB03600GABAA\u003c\/strong\u003e split-system heat pump. Pressure switches monitor the inducer motor's draft pressure to confirm safe venting conditions before the control board allows ignition to proceed. When either switch fails or sticks open, the system locks out before heating begins, leaving you with a blinking fault code and no heat output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 312926-252 — High Pressure Switch | 312926-258 — Low Pressure Switch | Rated water column (W.C.) calibrated to factory spec | SPST normally-open configuration | 1\/4\" Molex quick-connect terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to exact W.C. trip points for this model. Aftermarket substitutes frequently carry wider tolerances, causing nuisance lockouts or — more dangerously — failing to detect a true venting fault. OEM is strongly recommended for pressure switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Power off and confirm zero voltage at the control board before starting. Tools needed: 1\/4\" nut driver, flathead screwdriver, manometer (for verification), and needle-nose pliers. Photograph all hose and wire connections before disconnecting. Swap one switch at a time to simplify diagnosis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eCH14NB03600GABAA\u003c\/strong\u003e split-system heat pump. Always cross-reference the part number printed on the original switch before ordering — the high-pressure (312926-252) and low-pressure (312926-258) switches are not interchangeable. Verify hose port size and terminal configuration match your existing unit. Our fitment team is available to confirm compatibility before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909612687731,"sku":"CARRIE-CH14NB03600GABAA-PRESSURE_SWITCH-312926-252","price":27.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909612720499,"sku":"CARRIE-CH14NB03600GABAA-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_296d6355-f70b-4efe-9587-a19b7c733d69.jpg?v=1782930537","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch14nb03600gabaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}