Key Benefits for Technicians: Direct Cross-Reference: Validated replacement for 104L1853HS and SC15CLX

always verify the airflow direction against the original fan blade pitch before finalizing the installation

the RR3B-ULAC24V utilizes silver (Ag) contacts to maintain low contact resistance and long-term conductivity even under high-cycle conditions

maintaining strict operational parameters within gas manifolds

Lochinvar & A.O. Smith 100109887 Control Module 323613-751 Key Benefits for Technicians: DirectThe Lochinvar & A. O. Smith 100109887 Control Module is a critical integrated ignition control designed for precise gas fired water heater and boiler operation. This Fenwal 35 615922 113 equivalent manages direct spark ignition (DSI) sequences, flame sensing, and gas valve sequencing to ensure optimal combustion efficiency. Engineered for HVAC repair professionals, this 100109887 ignition board provides robust diagnostics through a dedicated LED