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Home » 400/Discovery Series - Models, Parts and Repairs Svc. » Circuit Boards / Sensors
1 - set LED and PT tach wheel sensors, wire and end connectors.Condition: Reconditioned, removed from a discovery series unit and ready for use. The primary cause of roomba experiencing "circle dance" behavior is when the tach LED or PT output is low or malfunctioning. Compatible with all 41XX and 42XX Discovery series models. View Models
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