Automatic Reset Logic: The 40°F differential allows the system to cycle back on automatically once safe temperatures are restored

Installing a switch with a different set point

By replacing the plunger assembly

Flash Steam Protection: Specifically designed to minimize hammering and vibration during emergency discharge cycles

This thermostatic expansion valve is a genuine replacement for the legacy Nordyne 669683 and Danfoss TR6 series

Lochinvar & A.O. Smith 100135316 Burner Freon Automatic Reset Logic: The 40°FMaintaining peak combustion efficiency in Lochinvar Copper Fin systems requires high grade components engineered for high input applications. The Lochinvar & A. O. Smith 100135316 Burner is a precision manufactured main burner assembly designed to deliver a stable, reliable flame pattern across various residential and commercial heating platforms. This authentic OEM replacement burner is physically and functionally identical to the BNR3501 burner,