The light on my garage door unit goes off and on by itself. when the light goes off the garage door stops opening or closing

If you haven't gotten your issue fixed yet... I had the same problem (stopped opening half way when using the remote, went down fine, could lift/close manually fine as well) and this happened on our first cold weather day of the year which was very telling. Anyhow, there are two gauges/dials on your garage door opener unit itself (above, where the light is) which controls how much torque/strength your door uses to open or shut through resistance. I turned mine up some and it now works fine; what likely happened was that the metal tracks or the wood frame condensed in the cold and was providing just enough resistance to stop it when opening - as they have a security device built in to stop if they meet any resistance. Hopefully this helps!

Reprogram the door opener.

Door sensors have nothing to do with door opening. Only closing. It sounds like you have a bad gear in the motor unit. Remove the cover and it will be obvious if the gear is bad.

Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem or the wiring to them. Nothing else causes this symptom.

there is an error in the system. most likely The safety beams (mounted on the track near the floor) are out of alignment and the LED light should be blinking. The garage door opener will not let the door close if the beams are misaligned. Realign them and the LEDs on the beam or on the operator will stay on. you should be able close the door now with one push.

HAVE YOU ADJUSTED THE SENSITIVITY??

ALSO SPRAY THE SPRING WITH A LITTLE WD-40 SOMETIMES THEY BIND AS THE DOOR CLOSES.

Unplug unit at power source and check and tighten all connections in the control box. And try this link.

http://www.garagedooropeners.us/technical_information.html

Mike

check electric saftey beams. shovel blocking them. dirty. aligned (LED on in each unit)

The motor is probably either stalling because the door is too stiff, or you have a beam break detector that is being triggered when the door is halfway down.

door will not close all the way. will go partway down then reverse itself.