{"product_id":"oem-lennox-dual-pressure-switch-assembly-63w56","title":"OEM Lennox Dual Pressure Switch Assembly — 63W56","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e63W56\u003c\/strong\u003e dual pressure switch assembly is an essential safety device in your Lennox gas furnace. Its two calibrated switches sense the vacuum generated by the inducer motor to verify correct venting and combustion airflow before the burners are permitted to light. This proving step protects against operation with a blocked flue or failed inducer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e the furnace attempts to start then locks out, repeated ignition failures, control board pressure switch fault codes, an inducer that runs without ignition, or persistent short cycling. Clogged sensing hoses, a torn diaphragm, or an out-of-spec setpoint are frequent culprits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox calibrates the \u003cstrong\u003e63W56\u003c\/strong\u003e to the precise pressure setpoints its furnaces require for safe sequencing. Non-OEM switches with mismatched thresholds create nuisance shutdowns or mask real venting hazards. The authentic Lennox assembly ensures accurate draft proving, dependable ignition, and the built-in safety performance your system was designed around.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081099133299,"sku":"LNX-63W56","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-dual-LNX-63W56.jpg?v=1783760313","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-dual-pressure-switch-assembly-63w56","provider":"National HVAC Parts","version":"1.0","type":"link"}