{"product_id":"oem-lennox-pressure-switch-kit-71k11","title":"OEM Lennox Pressure Switch Kit — 71K11","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e71K11\u003c\/strong\u003e pressure switch kit proves that the draft inducer is moving combustion air and venting flue gases before the furnace allows ignition. This safety control senses negative pressure through its sampling tube and closes its contacts to permit the ignition sequence, protecting against blocked vents and inducer failures.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e the furnace won't ignite, the inducer runs but the burner never lights, a pressure-switch-open fault code, short-cycling, or hard lockouts — often worsened by a cracked hose, clogged port, or condensate blockage that the kit's fresh tubing helps resolve.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the switch's trip pressure is calibrated to your Lennox furnace's inducer and vent design; even small deviations cause nuisance faults or unsafe operation. The OEM Lennox \u003cstrong\u003e71K11\u003c\/strong\u003e kit includes the correctly rated switch and matched hardware for a precise, reliable fit that generic switches can't guarantee.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081097134451,"sku":"LNX-71K11","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-71K11.jpg?v=1783762936","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-kit-71k11","provider":"National HVAC Parts","version":"1.0","type":"link"}