When I attempt to lower the garage door with the button inside the garage I have to hold it down until the door completely closes. If I let go of the button the garage door opens back up. Nothing is in the way of the sensors. However, I did notice that the red sensor light is not working. Do I need replacement sensors or would there be another reason for this issues. Email me at classactintx@yahoo.com on any troubleshooting or supply online manual for this Genie Intellicode product. Thanks.