As of 2015, Craftsman 41A5021 manuals are available online LiftMaster.com offers various Craftsman manuals that include the Craftsman 41A5021 user manual. ManualsOnline.com and ManualsLib.com also provide various Craftsman manuals that are freely accessible to users.
On LiftMaster.com, click on the Customer Support icon located on the top-right corner of the page. The site opens a new page that contains a Manuals icon on the middle part of the page. Click on the Manuals icon, and the next page shows available manuals. Select the desired manual, and proceed to the download page. Manuals provide more information about a product and help during troubleshooting.