Model #13953910 Craftsman garage door opener

  • Rail Assembly
    3 Results
  • Installation Parts
    3 Results
  • Motor Unit Assembly
    3 Results
  • Accessories
    3 Results

Error Codes

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Question and Answers

Q:

I have a garage door opener #13953910 and need to replace the worm gear assembly. Can you please send step by step instructions on how to do this.

A:

Thank you for your question on replacing the gears on the garage door opener.

The instructions come with the gear kit but I will give you the instruction sheet.

You will need some basic tools and be able to remove the head from the rail so you can repair it on a flat surface.

Remove the outer shell from the opener motor unit. The remove the limit switch and put it in a position that it will not get damaged when you are changing out the gears.

Remove the black encoder cup and also remove the RPM sensor board so it will not get damaged will working on the gear replacement.

Please make sure that when you put the gear on the shaft that you put the lock collar with the set back exactly where it was when you took it off. There will be some set screw marks in the motor shaft as a reference for returning it to the same spot.

I e-mailed the instructions that come with the kit to your e-mail address.

I hope this will help.

Sam A.

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Sam A -
Sears Technician
July 06, 2012
Q:

My garage door opener opens but when I try to close it the light flashes. If my finger is left on the wall unit it closes.

A:

You have a problem in the door safety sensors. Check and see if the led's are both on. If one is blinking, they are out of alignment. If one or both led's are not burning you need to replace the sensors. They are sold as a pair, replace both. If the door sensors are operating normally, the logic board in the motor unit or the wires to the sensors are bad.

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Jimmy K -
Sears Technician
Q:

Why does my Craftsman garage door opener go down but then come right back up?

A:

Pull the emergency release and check for any unusual resistance at the bottom of the door travel. If the door is binding up at the bottom, it will reverse. The images below are from pages 27 and 28 or your owner's manual. If you find no binding in the door, then it is likely that your down travel or down force will need to be adjusted. Adjusting one or both of these settings will likely resolve this problem.

Here is a link for the entire owner's manual if you need it: Owner's Manual

If you need more help, resubmit your question with additional details.

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Lyle W -
Sears Technician
July 09, 2009

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