Sometimes, you’ll notice that your garage door closes all the way and then immediately goes back up instead of staying in the closed position. This issue usually arises with brand new garage doors that were just installed or older models that may need to be reset. If this happens, the most likely culprit is the open and close limit settings of your garage door opener. http://m.youtube.com/embed/Z_eZc-kh40c
9.15 Install the bolts to secure the stationary center cones to the center bracket. Position the shaft here so it is the same distance from the header as the shaft is at each end. Finger-tighten the nuts until the stationary cones are flush against the center bearing plate. Forcing the cones by tightening the bolts may break a cone if it is catching on a bearing. Winding torsion springs with cracked cones can cause the springs to spin loose and the bars to fly. Secure the bolts.
The new opener was installed yesterday and today for a while it wouldn't close properly. The customer service representative said they will probably have to reverse the sensors. However, no one could come out today (Friday) or tomorrow. She will call me by Tuesday of next week to schedule someone to come here. The customer service rep. and the technician were nice but as of now, my new garage opener is not working to my satisfaction.