{"product_id":"carrier-ch16na04800gbaaa-pressure-switch-1vlc9v","title":"OEM Carrier Low Pressure Switch 312926-258 for CH16NA04800GBAAA","description":"\u003ch1\u003eOEM Carrier Low Pressure Switch 312926-258 for Model CH16NA04800GBAAA\u003c\/h1\u003e\u003cp\u003eThis OEM low pressure switch (part number \u003cstrong\u003e312926-258\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier CH16NA04800GBAAA\u003c\/strong\u003e condensing unit. The pressure switch monitors negative pressure created by the inducer motor to confirm adequate combustion airflow before allowing the ignition sequence to proceed. When this switch fails or becomes stuck open, the control board cannot verify proper draft and will lock out the system entirely — resulting in a no-heat condition that often mimics inducer or control board failure. Common symptoms include a blinking fault code indicating a pressure switch error, the inducer running continuously without advancing to ignition, or the furnace cycling off immediately after startup.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Low pressure switch | OEM part number 312926-258 | Factory-rated W.C. (water column) setting | Single-port hose barb connection | 24V control circuit compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory OEM switch is calibrated to the exact W.C. trip point required by the CH16NA04800GBAAA. Aftermarket pressure switches frequently carry ±10–15% tolerance on actuation thresholds, which can cause nuisance lockouts or — more dangerously — allow ignition under insufficient draft conditions.\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 multimeter for continuity verification. Inspect the rubber hose for cracks or blockages before installing the new switch, as a clogged hose is a leading cause of pressure switch failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eCH16NA04800GBAAA\u003c\/strong\u003e condensing unit. Always verify the OEM part number 312926-258 against the label on your existing switch and cross-reference your unit's data plate before ordering. Our fitment specialists are available to confirm compatibility prior to purchase — same-day shipping available on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909609673075,"sku":"CARRIE-CH16NA04800GBAAA-PRESSURE_SWITCH-312926-258","price":27.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909609705843,"sku":"CARRIE-CH16NA04800GBAAA-PRESSURE_SWITCH-312926-258-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-312926-258_7318d8af-9a96-465e-963d-9ea9d8aa9733.jpg?v=1782928532","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch16na04800gbaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}