Lochinvar & A.O. Smith 100148403 Limit Switch 321894-708 A yellow flame typically indicates

A yellow flame typically indicates insufficient primary air or a contaminated pilot orifice

Rugged construction designed for high-cycle reliability in commercial boiler and water heater applications

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Standard Connection: 1-1/4 inch NPT threaded connections facilitate easy integration with existing iron pipe schedules

Lochinvar & A.O. Smith 100148403 Limit Switch 321894-708 A yellow flame typically indicatesThe Lochinvar & A. O. Smith 100148403 Limit Switch is a critical OEM replacement part designed for high limit temperature protection in commercial water heaters, boilers, and pool heaters. This 175 degree high limit assembly monitors the heat exchanger or outlet water temperature, providing an essential safety cutoff to prevent thermal runaway and equipment damage. Engineered for HVAC systems requiring precise thermal regulation, the 100148403 ensures