Lochinvar & A.O. Smith 100093972 Thermopile Assembly

When resolving pilot signal failures or burner dropouts in high-recovery residential or commercial gas-fired systems, the Lochinvar & A.O. Smith 100093972 Natural Gas Thermopile Assembly 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 NG pilot thermopile with tubing, this component ensures precise flame sensing and rapid thermal response. By installing this genuine 100093972 water heater thermopile, you maintain the factory-engineered combustion sequence and safety parameters of Lochinvar boiler parts and A.O. Smith equipment. As a direct replacement thermopile assembly, 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 natural gas pilot assembly restores the reliability of the standing pilot system, preventing nuisance shutdowns in commercial water heating applications and ensuring consistent ignition performance.

Technical Performance Benefits

• OEM Precision: Genuine A.O. Smith 100093972 part ensures exact millivolt output for compatibility with specific gas control valves.
• Complete Assembly: Includes essential tubing and bracketry to streamline field installation and ensure proper pilot burner alignment.
• System Integrity: Specifically calibrated for natural gas heating systems, preventing the carbon soot buildup common with incorrect orifice sizing.
• Industrial Durability: Engineered to withstand high combustion chamber temperatures for sustained flame rectification.

Common Technical Questions

What is the cause of a low millivolt reading from the 100093972 thermopile?
Low 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 thermopile assembly fails to produce at least 650mV-750mV (open circuit), the internal junctions are likely degraded and require replacement.

Is the 100093972 compatible with Liquid Propane (LP) units?
No, this specific assembly is designed for Natural Gas (NG) 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.

Does this assembly include the pilot tubing and orifice?
Yes, this is a complete NG thermopile assembly including the integrated tubing, providing a comprehensive solution for restoring the pilot burner circuit to factory standards.

Disclaimer: 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.