{"product_id":"oem-lennox-gas-valve-78l42","title":"OEM Lennox Gas Valve — 78L42","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e78L42\u003c\/strong\u003e gas valve meters and regulates the gas supply feeding your Lennox furnace burners. On each heating cycle it energizes to deliver a precisely regulated flow of fuel for clean, efficient combustion, then closes securely the moment the thermostat is satisfied or a safety circuit trips. Because it directly governs both fuel delivery and shutoff, this valve sits at the heart of your furnace's safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e no ignition or repeated ignition lockouts, a furnace that produces only cold air, an audible click with no corresponding gas flow, delayed or rough ignition, inconsistent flame size, or a valve that buzzes, sticks, or fails to seal completely when de-energized.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the Lennox \u003cstrong\u003e78L42\u003c\/strong\u003e is calibrated to your system's exact manifold pressure and control voltage, ensuring correct BTU output and dependable safety shutoff. Generic replacements can misregulate gas pressure, trigger nuisance faults, and compromise combustion safety. Installing the factory-specified valve protects your equipment, maintains rated efficiency, and keeps your warranty intact.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081095299443,"sku":"LNX-78L42","price":169.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-gas-valve-assembly-LNX-78L42.jpg?v=1783761294","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-gas-valve-78l42","provider":"National HVAC Parts","version":"1.0","type":"link"}