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

...motor 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 trolley jammed again against the motor, luckily I had clamped my vice grips there, so it did not smash the housing. Seems this motor will not stay in phase, keeps wanting to go up. Any

...to re-engage by running the opener but it just hums - the Cable side is dangerously tight and the motor unit won't release the tension, and the chain is sagging on the other side of the chain ...

...keeps traveling so far that the track rail bends when the door closes completely. I adjusted the arm that connects the trolley with the door as straight as I could, but no good results. any ...

...motor to no avail. W could it be? I agree with the closing resistance may be set incorrectly, all openers have a safety feature that senses if something is keeping the door from closing, this is back ...

closing using the button or the key I have to *keep the button pressed*, or the key turned until the door is *completely closed*. Otherwise it just pops right back up. The motor unit/box makes a click

...Push the button and it closes fine You have either a broken door spring or the drive gear in the motor unit is bad. The drive gear is a white nylon gear just in front of the motor and it will be ...

10 times when the door reverses it is a door sensor problem. If not, you may have a bad RPM sensor board which is a small printed circuit just in front of the motor. It will keep the door from closing

...keeps happening. Any suggestions? Here are some things to check. Loosen the chain enough so that you can remove it from the sprocket above the motor unit. With the door closed run the motor until the ...

i have to manually help the garage door open or close when button is pressed, if not the motor will just keep running and wont open or close at all.I have a craftsman 1/2HP heavy duty garage door ...