Lochinvar & A.O. Smith 100111065 Switch 323613-751 What is the difference between

What is the difference between the 4074EDC and 4074EDC/U

designed to manage the activation of heating elements and blower motors to prevent circuit overloads during the initial startup

this component is engineered to interrupt the burner circuit when temperatures reach the 250-degree Fahrenheit cutoff

specifically engineered for FT-20 and FTB-20/175 configurations

Lochinvar & A.O. Smith 100111065 Switch 323613-751 What is the difference betweenThe Lochinvar & A. O. Smith 100111065 Blocked Outlet Switch is a critical safety component designed for high efficiency commercial gas fired systems, including the BTH, SUF, and HCG series. Engineered specifically for natural gas water heaters, this OEM replacement part monitors the venting system for potential obstructions. If the switch detects a significant restriction or blockage in the flue outlet, it immediately interrupts the control circuit to