The Genie 32987A.S Optical Interrupt Wheel is an OEM encoder wheel for select Genie residential garage door openers. Installed on the motor shaft, it works with the opener’s optical RPM sensor to generate pulse feedback the control board uses for speed monitoring, travel control, and safety functions. Replacing a damaged or worn wheel can restore consistent door movement and resolve RPM-related faults, making it a reliable replacement part for maintenance or repair.
The 32987A.S fits only models that specify this part number in their parts list; verify compatibility in your opener’s manual or on the unit’s parts diagram before ordering. Installation typically involves removing the motor cover, seating the wheel on the shaft aligned with the optical sensor, and confirming it rotates freely without contact; disconnect power before servicing and keep the sensor path clean for dependable operation. After replacement, run a full open/close cycle and perform any required travel and force checks per Genie instructions. Common search terms include Genie 32987A.S, optical interrupt wheel, encoder wheel, RPM sensor wheel, Genie garage door opener replacement part, and OEM Genie component.