Rhonda anytime you try to close the door and the lights flash 10 times and the door reverses to the open position you have a problem with the sensors in the doorway or the wiring to them. Each sensor has a small light that must be on to work. If neither of your sensors has the light on you either have a wiring problem or bad sensors. If the light on one is on and the other is off you should be able to tweak them a bit so that they are pointed directly at one another and both lights should come on.

THANKS!!! We were having the same problem and this worked! Saved a service call to fix something so simple.