Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ "keeps running close" Questions

I have a craftsman garage door opener and the chain came off trac The chain came off of wheel, It's too tight for me to put it back on, how do I loosen it up? YES - YOU ALSO NEED TO BE SURE IT IS IN ...

...close position, then reverses and the door opens about 6 inches then stops. I tried adjusting the up and down force but the same thing keeps happening. Any suggestions? Here are some things to check. ...

...close 4 inches before it reverses backward 4 inches from original starting position. I've played with adjusting the up down limits until the cows came home.....but just keeps doing it. Is it time to ...

...running and wont open or close at all.I have a craftsman 1/2HP heavy duty garage door opener probably about10yrs old. Just bought the house a year ago and it was already installed Try this link, ...

...keeps running I replaced the drive belt on my garage door opener because the other one broke. My garage door works fine in the opening position. It open to the position where it should, stops and the ...

...keeps running until i smack the side of the unit and then it quits. it opens fine, but won't turn off when i try to close it. any ideas? I would remove the cover and take a good look at the limit ...

...close. Light works and all the light indicators are green. Is the trolley jammed against the bolt just in front of the motor unit? If so remove the bolt and then run the door until it is closed. Now ...

Door opens alittle then closes but not back all the way Ok let me try to tell you the problem I'll push door button to open door door opens about 18 inches then reverses maybe back 8 inches.So I'll ...

The small green LED light on garage door motor head out My garage door opened & then quit. have goggled & checked all the usual. the one thing not working is the small green LED bulb in the ...

I just installed a Sears Craftsman 1/2 HP Garage Door opener - it was working fine through adjustments until it closed too tight as I was doing the adjustments to keep the door closed. I disengaged, ...