The basic process goes something like this.
How to change craftsman garage door opener.
Enter the existing four digit code and hold step 3.
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Set the step ladder under the garage door opener in your garage and use it to access the up and down limit switch adjustment screws located on the side of the garage door opener motor housing.
First you ll want to open the access panel on the backside of your garage door opener.
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Place the opener on a ladder and use scrap lumber to get it at the height you need.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
On the base unit remove the back panel and press but do not hold the lrn button.
Release when the opener lights blink twice or if no lights are fitted you.
Look for a button that says learn and hold that down until the light starts blinking.
Align the opener s rail with the center of the garage door.
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Open the garage door from the inside and stand in front of the wireless outdoor control panel.
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Follow the manufacturer s instructions to assemble the opener and mount the rail to the header bracket above the door.
Now you ve reset your door codes and your remotes should not work.
Move the switches inside the remote to change.
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Repeat to change the code in all additional remotes.
How to reset the code on a craftsman garage door.
How to change the code on craftsman garage door opener.
Take the cover off of the garage door s remote control to expose the switches inside the remote.