Sears garage door opener will not open or close all the way

jimv63October 9, 2009

I just moved into a house and the auto garage door will not work properly. There are no remotes and I can't find the sensors. It seems that this door was installed without sensors. Anyway the door will only open a few inches and then closes. When I open it manually and try to close it with the button on the wall the door moves a few inches and stalls. If I keep pushing the button it will close and sometimes open. It is an old unit Sears/Craftsman 1/2hp unit. Can anyone help?

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don_1_2006

If the opener was manufactured prior to 1993 it did not come with sensors. It sounds like you may have a combination of problems. I would first check the door springs to make sure one of them isn't broken. Next remove the cover off the motor unit and check the condition of the drive gear. It is white nylon and is just in front of the motor. It should be obvious if it is going bad. On the rear of the motor unit you will find a couple controls. The up and down force adjustments. Increase both of these about 1/4 turn and see if there is any improvement. The normal life of these units is 10 years so you may have a losing cause here. (There are always exceptions though).

    Bookmark   October 9, 2009 at 6:32PM
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valenciavalencia

Ok i read so many posts but none seem to help me. My garage door opener is a 1/2 hp sears craftsman prt#41A4315-78 that is year (7/95) the sensors have no lit LED lights, but they have been off for at least 2 years. My wall button is just one button (no lock/unlock button) It works (meaning I don't have to hold it down to get it to work) to close and open the garage door. The remote does not. i press it and it won't close the door, the door only move a inch then blinks 10 times, then the main box LEd blinks 4 times, i know that supposedly this is a sensor problem, but if that was the case wouldn't the wall button not work either?

    Bookmark   October 11, 2009 at 6:49PM
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don_1_2006

Anytime the main light blinks 10 times and the door reverses to the open position while closing it is a door sensor problem. Nothing else will cause that. You have two clues telling you the sensors are bad. The main light blinking 10 times and the LED with the diagnostic code.

    Bookmark   October 12, 2009 at 10:04AM
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