Safety first: Unplug the opener before removing the cover. Do not operate the opener with a stripped gear; it can cause further damage.

1. Remove opener cover: With power disconnected, remove the screws and cover to expose the internal drive gear and sprocket.
2. Inspect drive gear: Look at the large nylon gear. If teeth are worn down or missing, it must be replaced.
3. Check sprocket and shaft: Inspect the metal sprocket that drives the chain/belt. Ensure it is not broken and that the retaining pin or clip is intact.
4. Replace gear and sprocket kit: Purchase an Overhead Door gear and sprocket kit for your model. Follow the kit instructions to remove the old gear, clean out debris, and install the new components.
5. Verify door balance: Before reattaching the opener to the door, confirm the door is properly balanced to avoid overloading the new gear.
6. Reassemble and test: Reinstall the cover, restore power, and run the opener through several cycles.

Garage door opener motor runs but chain/belt does not move on Overhead Door opener

Possible Causes