Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
My craftsman 3/4 hp only opens 6in, if you give it a hand by lifting on the handle it will open, but not if you use the opener on its own
There should be 2 or 3 knobs/screws on the side to adjust torque to lift and to let down the door. Sounds like you need to increase the lift torque setting. If its maxed you can try greasing the rollers/wheels to help remove the drag. If still does not lift it then you may need a bigger motor (1hp) or you can add some springs to help lift it. Check your sensors too. Make sure they aren't being tripped at 6" up.
Posted on Apr 20, 2014
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Posted on Jan 02, 2017
SOURCE: Craftsman Garage Door Opener
From the manual:
Security+Light Feature: Lights will also turn on when someone walks through the open garage door. With a Premium Control Console, this feature may be turned off as follows: With the opener lights off, press and hold the light button for 10 seconds, until the light goes on and off again. To restore this feature, start with the opener lights on, then press and hold the light button for 10 seconds until the light goes off, then on again.
Posted on Oct 17, 2008
I called Sears garage door customer service number due to the same issue. The test is to disengage the opener drive by pulling the emergency disengage handle, then open the door half way manually and then let it go. If it stays there it is a door/track/lub problem; if it drops down and closes its a garage door opener problem. Mine stayed open half way during this test so it was a door/track/lub problem. After using silicone spray on all tracks, rollers, and springs mine has been working great. Good luck.........
Posted on Dec 19, 2008
You say you "setup the remote and the main box but doesn't solve." I think you mean you programmed the unit but I'm not sure. Anyway try holding the smart/learn button in for 10 seconds and this will erase the memory. None of the remotes should work. Now when you are sure the neighbor will not be using their opener, program your remotes. This may be what you did but I'm not sure.
Posted on Aug 27, 2009
SOURCE: garage door opening by itself
Anytime a door opens and/or closes by itself I look for a smashed wire between the motor unit and the wall button.
If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door.
Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.
The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.
The test is to disconnect the push button wires at the power unit. If the self operation stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.
Posted on May 27, 2010
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