{"product_id":"oem-lennox-pressure-switch-38m64","title":"OEM Lennox Pressure Switch — 38M64","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e38M64\u003c\/strong\u003e pressure switch safeguards the ignition sequence on your Lennox furnace. It senses the vacuum produced by the induced-draft blower and verifies adequate combustion airflow and proper flue venting before permitting the burners to fire. Calibrated to the precise setpoint Lennox specified for your furnace, it prevents ignition whenever venting is restricted or the draft motor underperforms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDraft inducer spins up but the furnace fails to ignite\u003c\/li\u003e\n\u003cli\u003ePersistent pressure switch open\/closed error codes\u003c\/li\u003e\n\u003cli\u003eShort cycling or unexpected safety lockouts\u003c\/li\u003e\n\u003cli\u003eNo heat during cold, high-demand conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eOEM matters most on safety controls. A mismatched aftermarket switch can nuisance-trip or bypass a genuine fault, leaving your system unreliable or unsafe. This factory \u003cstrong\u003e38M64\u003c\/strong\u003e replacement delivers the exact pressure calibration, hose port, and electrical connections your Lennox unit was built around, restoring dependable, safe furnace operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081107587443,"sku":"LNX-38M64","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-38M64.jpg?v=1783763036","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-38m64","provider":"National HVAC Parts","version":"1.0","type":"link"}