tag:blogger.com,1999:blog-1781261651522242924.post1331659481717465044..comments2024-02-22T14:10:50.002-08:00Comments on sandrin.com | frank sandrin: Garage door opener trolley hits stop boltFrank Sandrinhttp://www.blogger.com/profile/17095504911392266283noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-1781261651522242924.post-72119358147805540392014-06-04T14:00:09.334-07:002014-06-04T14:00:09.334-07:00Let me add to the chorus of thanks for this inform...Let me add to the chorus of thanks for this information, Frank. I spent the better part of a day trying to figure out why my in-laws' garage door opener suddenly began acting so erratically -- stopping part way in both directions. Understanding how a limit switch works made it possible to diagnose and fix the problem within minutes. Bravo!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1781261651522242924.post-2546055943524467072013-08-18T16:18:55.361-07:002013-08-18T16:18:55.361-07:00Thanks so much! Fiddled with the levels for two h...Thanks so much! Fiddled with the levels for two hours (my ignorance + overheating) and got nowhere. Took a break, found this page and read through your explanation and was finished in minutes. Amazing how much faster a project gets done when you understand what's happening rather than just turning screws and trying to figure it out. Thanks!!!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1781261651522242924.post-64485124008997643552012-07-29T22:11:59.768-07:002012-07-29T22:11:59.768-07:00Great! Glad it helped out.Great! Glad it helped out.Frank Sandrinhttps://www.blogger.com/profile/17095504911392266283noreply@blogger.comtag:blogger.com,1999:blog-1781261651522242924.post-2910527371305866232012-07-29T15:12:31.050-07:002012-07-29T15:12:31.050-07:00Used your post, and fixed my problem within minute...Used your post, and fixed my problem within minutes. Wasn't too difficult, but without your breakdown of the limit switch assembly it would have taken longer. Just want to say thanks for taking the time to put this online.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1781261651522242924.post-27360091119429284342012-01-14T12:40:35.336-08:002012-01-14T12:40:35.336-08:00All of the above is correct, parts cost about $20 ...All of the above is correct, parts cost about $20 for the gear which started the repair. But when the limit assembly got out of adjustment it wanted to travel too far one way and not far enough the other. It also hit the stop bolt and started humming and wouldnt move. I disconnected the chain move it back readjusted the stops and it works fine now thanks to posts like this one.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1781261651522242924.post-25781895335154222482011-12-18T15:16:22.687-08:002011-12-18T15:16:22.687-08:00Limit switch must be adjusted according to the ins...Limit switch must be adjusted according to the instructions listed above. It means that the door thinks it's already down so it won't move down. Some one must adjust the down contact so it doesn't think it's already down. Keep in mind I am NOT a professional and adjustments to this device can be dangerous due to the amount of force it generates. If you don't know what you are doing hire a professional!!Frank Sandrinhttps://www.blogger.com/profile/17095504911392266283noreply@blogger.comtag:blogger.com,1999:blog-1781261651522242924.post-48250149686915911442011-12-14T15:14:16.837-08:002011-12-14T15:14:16.837-08:00I just replaced my limit switch. Now its stuck in...I just replaced my limit switch. Now its stuck in the up position and wont go back down. I just get a hum when I press the button...help!Anonymousnoreply@blogger.com