{"product_id":"carrier-pressure-switch-gb3aav036050acja","title":"OEM Carrier Furnace Pressure Switch for Model GB3AAV036050ACJA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Furnace Pressure Switch for Model GB3AAV036050ACJA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier pressure switch is the draft-proving safety device on the GB3AAV036050ACJA furnace, confirming the inducer motor has established proper venting before the burners are allowed to fire. It monitors negative pressure and closes its contacts only when airflow meets spec, blocking ignition during blocked-flue or weak-draft conditions to keep combustion gases venting safely. A stuck or failed switch commonly triggers ignition lockout and pressure-switch fault codes, resulting in no heat. The genuine part guarantees the exact trip setpoint in inches of water column, the correct port configuration, and the proper mounting bracket so the furnace's safety logic behaves as engineered. Replacement is a beginner-level task: turn off power, detach the sensing hose, remove the mounting screws, slide off the wire spades, and install the new switch in reverse order. Most jobs take 15 to 20 minutes with one screwdriver. Clear any moisture or lint from the hose before reconnecting. We ship same-day on orders placed before 3PM CST so you can quickly restore safe, reliable furnace operation during the heating season.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model GB3AAV036050ACJA.\u003c\/p\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping before 3 PM CST. 30-day returns on uninstalled parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":62942736089459,"sku":"carrier-pressure-switch-gb3aav036050acja","price":42.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-gb3aav036050acja.jpg?v=1781469632","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pressure-switch-gb3aav036050acja","provider":"National HVAC Parts","version":"1.0","type":"link"}