{"product_id":"oem-lennox-pressure-switch-33w17","title":"OEM Lennox Pressure Switch — 33W17","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e33W17\u003c\/strong\u003e pressure switch is a critical safety component in your Lennox gas furnace. It monitors venting and combustion air flow, confirming that the draft inducer is moving exhaust gases safely before the control board permits ignition. This part is a direct factory replacement engineered to the exact pressure set point your Lennox unit requires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing \u003cstrong\u003e33W17\u003c\/strong\u003e often causes the furnace to lock out on startup, short cycle, or display a pressure switch fault code. You may notice the inducer motor running but the burners never lighting, or the furnace repeatedly attempting ignition without producing heat. Cracked hoses, a stuck diaphragm, or a switch that fails to close on a call for heat are typical causes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox furnaces are calibrated to a specific switch trip pressure measured in inches of water column. Universal or aftermarket switches with the wrong set point can allow unsafe operation or cause nuisance lockouts. Installing the genuine \u003cstrong\u003e33W17\u003c\/strong\u003e guarantees the correct pressure rating, proper terminal fit, and dependable safety protection for your Lennox equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081108603251,"sku":"LNX-33W17","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-LNX-33W17.jpg?v=1783763031","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-33w17","provider":"National HVAC Parts","version":"1.0","type":"link"}