Marvair 70947 Control Board 320720-756 Smith 100271315 Limit Switch is

Smith 100271315 Limit Switch is a critical safety component engineered for high-performance hydronic and water heating systems

the bolt-on design ensures a low-resistance connection that prevents arcing and overheating compared to standard plug-in models

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ensuring seamless integration with your DDC controller or command relay interface

technicians rely on this OEM Lennox furnace part to resolve issues with "lazy" pilot flames or erratic ignition sequencing caused by carbon buildup or internal erosion of the orifice bore

Marvair 70947 Control Board 320720-756 Smith 100271315 Limit Switch isThe Marvair 70947 Control Board is the central diagnostic and operational hub for high efficiency Marvair HVAC systems, including MAH and MGH vertical wall mounted units. As a veteran grade OEM replacement control board, this component is engineered to manage critical HVAC system functions such as compressor sequencing, low ambient fan cycling, and lead lag logic. It features an integrated diagnostic LED to assist technicians with rapid fault