Can I use the 304400 on an FS7-4 series switch

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

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

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

Key Benefits Heavy-Duty Load Handling: Rated for 15A resistive and 1/3 HP motor loads

Lochinvar & A.O. Smith 100135316 Burner Freon Can I use the 304400Maintaining 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,