Honeywell SM11450 PCB (control board)

Honeywell SM11450U control board for Baxi and Westen gas boilers. Original electronic controller (PCB) for heating systems. The Honeywell SM11450U board is a specialized electronic control module designed for gas boilers. This device is also known under manufacturer part numbers: CS0171B-LS, 0051BP2590, TYPE SMCOE01. In warehouse inventory systems, the board may be coded as 534.568.034. The original SM11450U controller provides full control over the heating system operation, fault diagnostics, and safe operation of gas equipment. Purpose and compatibility: The SM11450U control board was developed by Honeywell engineers specifically for gas boilers of the following brands and models: Manufacturer Compatible boiler series Baxi ECO 240i / 280i, ECO Compact, Eco4S, Main Combi Eco Westen Energy 1.240 / 1.280, ENERGY Board marking CS0171B‑LS (Rev.A / Rev.B), 0051BP2590, TYPE SMCOE01 This controller is the "brain" of the heating system and is responsible for all key processes. The module is ideal for: Replacing a failed board: If the boiler does not start, displays an error, operates unstably, or does not respond to commands, electronics replacement is likely required. Planned maintenance: Creating a spare parts stock for service departments and management companies. Restoring operation of various Baxi and Westen boiler modifications and revisions. Important: When ordering, pay attention to the board revision (Rev.A or Rev.B), as there may be differences in hardware or firmware affecting compatibility with a specific boiler model. Functional capabilities: The original Honeywell SM11450U board performs critical functions ensuring stable and safe boiler operation: Gas supply control: Reg