Installed and found it lacking power. If this is your issue you might need to watch the video to see how to wire it for 110v. My unit came wired for 220v but once I wired it for 110v it worked flawlessly. I might even go as far as to say it runs better than the original motor. It is super quiet, runs cool to the touch even after using it for half the day (not constantly but off and on), and the cost was $100 + some change. Should of ordered it a long time ago instead of waiting until my old motor almost burned the garage down. We will see the longevity, if it craps out I'll update my review accordingly...