{"product_id":"lochinvar-a-o-smith-100093972-thermopile-assembly","title":"Lochinvar \u0026 A.O. Smith 100093972 Thermopile Assembly","description":"\u003cp\u003eWhen resolving pilot signal failures or burner dropouts in high-recovery residential or commercial gas-fired systems, the \u003cstrong\u003eLochinvar \u0026amp; A.O. Smith 100093972 Natural Gas Thermopile Assembly\u003c\/strong\u003e is the specified OEM replacement. This assembly is critical for generating the millivoltage required to operate the gas valve without an external power source. Featuring a high-grade \u003cstrong\u003eNG pilot thermopile with tubing\u003c\/strong\u003e, this component ensures precise flame sensing and rapid thermal response. By installing this genuine \u003cstrong\u003e100093972 water heater thermopile\u003c\/strong\u003e, you maintain the factory-engineered combustion sequence and safety parameters of \u003cstrong\u003eLochinvar boiler parts\u003c\/strong\u003e and A.O. Smith equipment. As a \u003cstrong\u003edirect replacement thermopile assembly\u003c\/strong\u003e, it eliminates the compatibility issues often found with universal aftermarket kits, particularly regarding the millivolt output threshold and thermocouple lead length. Correct installation of this \u003cstrong\u003enatural gas pilot assembly\u003c\/strong\u003e restores the reliability of the standing pilot system, preventing nuisance shutdowns in commercial water heating applications and ensuring consistent ignition performance.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Performance Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Precision:\u003c\/strong\u003e Genuine \u003cstrong\u003eA.O. Smith 100093972\u003c\/strong\u003e part ensures exact millivolt output for compatibility with specific gas control valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Assembly:\u003c\/strong\u003e Includes essential tubing and bracketry to streamline field installation and ensure proper pilot burner alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Integrity:\u003c\/strong\u003e Specifically calibrated for \u003cstrong\u003enatural gas heating systems\u003c\/strong\u003e, preventing the carbon soot buildup common with incorrect orifice sizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Durability:\u003c\/strong\u003e Engineered to withstand high combustion chamber temperatures for sustained flame rectification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Technical Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the cause of a low millivolt reading from the 100093972 thermopile?\u003c\/strong\u003e\u003cbr\u003e\nLow voltage is typically caused by heavy carbon deposits on the thermopile head or a weak pilot flame. If the pilot flame is crisp and blue but the \u003cstrong\u003ethermopile assembly\u003c\/strong\u003e fails to produce at least 650mV-750mV (open circuit), the internal junctions are likely degraded and require replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the 100093972 compatible with Liquid Propane (LP) units?\u003c\/strong\u003e\u003cbr\u003e\nNo, this specific assembly is designed for \u003cstrong\u003eNatural Gas (NG)\u003c\/strong\u003e applications. Using natural gas pilot components in LP systems can lead to dangerous combustion levels and should be avoided; always match the part to the specific fuel type listed on the data plate.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this assembly include the pilot tubing and orifice?\u003c\/strong\u003e\u003cbr\u003e\nYes, this is a complete \u003cstrong\u003eNG thermopile assembly\u003c\/strong\u003e including the integrated tubing, providing a comprehensive solution for restoring the pilot burner circuit to factory standards.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Lochinvar \u0026 A.O. Smith","offers":[{"title":"Default Title","offer_id":1722958938137,"sku":"100093972","price":174.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_36ba2537-015d-45e0-a373-59e8440d7322.png?v=1751413207","url":"https:\/\/www.gsistore.com\/en-ca\/products\/lochinvar-a-o-smith-100093972-thermopile-assembly","provider":"GSIstore","version":"1.0","type":"link"}