{"product_id":"carrier-pg8uaa042091adja-pressure-switch-h43srx","title":"OEM Carrier Pressure Switch w\/ Bracket .33 WC — PG8UAA042091ADJA","description":"\u003ch1\u003eOEM Carrier Pressure Switch w\/ Bracket (HK06WC090) for Model PG8UAA042091ADJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM pressure switch with integrated mounting bracket for the \u003cstrong\u003eCarrier PG8UAA042091ADJA\u003c\/strong\u003e packaged gas furnace. The pressure switch is a safety device that monitors negative pressure generated by the inducer motor to confirm proper draft before allowing ignition. If the switch fails to close — or fails to open — the control board will lock out the furnace, preventing it from firing. Common symptoms include a furnace that attempts to start and then immediately locks out, a flashing fault code indicating pressure switch failure, or an inducer that runs continuously without advancing to ignition.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e -0.33\" W.C. (inches water column) set point | SPST (Single-Pole, Single-Throw) | Includes factory mounting bracket | OEM part number HK06WC090\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM switch is calibrated to the exact W.C. rating specified by Carrier engineering. Off-brand substitutes often carry wider trip-point tolerances, which can allow unsafe draft conditions or cause nuisance lockouts — always match the W.C. rating precisely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Power down and disconnect the furnace before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers. Photograph all hose and wire connections before removal. Swap the rubber pressure hose and two-wire connector to the new switch, secure the bracket, and verify hose integrity before restoring power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock orders ship same business day when placed before our daily cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct OEM replacement for \u003cstrong\u003eCarrier model PG8UAA042091ADJA\u003c\/strong\u003e packaged gas furnaces. Also supersedes legacy part numbers HK06WC088, HK06WC086, HK06WC076, HK06WC072, HK06WC073, HK06WC074, HK660001, 326750-751, 310315-751, and 310315-752 — always verify the W.C. rating on your existing switch before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642758091123,"sku":"CARRIE-PG8UAA042091ADJA-PRESSURE_SWITCH-HK06WC090","price":75.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642758123891,"sku":"CARRIE-PG8UAA042091ADJA-PRESSURE_SWITCH-HK06WC090-GEN","price":66.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK06WC090_c262e813-1d16-44e6-8484-c6556fd416bf.jpg?v=1775038536","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8uaa042091adja-pressure-switch-h43srx","provider":"National HVAC Parts","version":"1.0","type":"link"}