Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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The garage door opener is not cycling all the way closed, before returning fully opened. It is traveling about two feet down before stopping and gong back to the opened position. There is no obstruction in the way of the floor sensors. No adjustment have been made to the up or down travel settings. Can you help with this problem?

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If the main lights are flashing 10 times it is a door sensor problem. If the lights are not flashing it is a bad RPM sensor board which is a small printed circuit board just in front of the motor. It can be purchased at Sears or any good door opener service company.

Posted on Sep 23, 2009

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Posted on Jan 02, 2017

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What's the difference between the "limit controls" & the "force controls" on Chamberlain garage door opener model 1245r?


Limit controls determine the maximum up and down point for the door, so that it doesn't keep trying to close when it's already all the way down, or continue to open when it's fully open.
Force controls determine how much pressure can be applied against the direction of travel before the door will sense the pressure and stop moving. Imagine setting a watermelon or egg in the way of the door when it's closing. If your force control is not set correctly, it will crush the watermelon or egg.

Nov 29, 2014 | Building Materials

1 Answer

Resetting motor of a dominator garage door


Doe the motor have a battery back-up, or mains only?
Step 1: Disconnect the linking arm from the motor traveller, and test (by pressing button on remote or wall console), that motor runs traveller to the fully open position, and stops where the "open" limit switch is. Then run motor (by pressing button on remote or wall console), to the fully closed position. If the motor fails to run through a full open/ full close cycle, the limit switches require checking.Assuming that the motor runs through the full open/full closed cycle, focus on the door. All motors have built in circuitry, preventing motors from crushing objects. A double garage door should be able to be lifted easily by one hand. The door should be able to be left at any height, and remain there, or creep ever so slowly downwards (travel time of approx 10mm per 5 seconds is ok). If your door is properly balanced, and the motor will still not lift it, the control card on the motor is damaged, and requires replacement.

Jul 02, 2017 | Home Security

1 Answer

Hello, I replaced a worn out garage door motor with a new craftsman model. The door try's to travel down when the opener is pushed, even though the door is fully closed. I'm no garage door expert, but...


Yes, reread the directions travel needs to be set for both up and down, and MUCH MORE IMPORTANTLY the safety settings must be set. This allows the door to close on a foot and not cause damage....VERY IMPORTANT to set correctly....

Apr 04, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a Chamberlain whisper drive 1/2 hp garage door opener model 9200 and when the weather is rainy or snowy out the door will close fully wait a second then open again. This happens until I can stop it...


It sounds like the door is traveling just a bit too far in the down direction. Locate the 'down limit' adjustment on the side of the motor unit and turn the control in the opposite direction of the arrow printed on the cover. Some tweaking will be necessary to get it just right.

Oct 04, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door goes up about a foot and stops


The sensors have nothing to do with your door opening. First thing to check are the door springs. One may be broken. Next remove the cover and check the drive gear. It is a white nylon gear just in front of the motor. It may be stripped.

Jun 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opens about 2 feet and then closes in same cycle


There is an issue with the limit settings. They are the three white screws you can see with the cover off. Put the door in the down position. take the small white piece off the bottom of the gear and sprocket assembly. Turn the center screw until the silver "wing" is at the bottom position. Put the white piece back on the bottom of the gear and sprocket. Adjust the up screw until the door opens fully. Check the force settings. They both should be set on 4-5.

Feb 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

3/4hp craftsman will not close the door fully


There are adjustments on the unit itself that control the distance door travels to close as well as the force it uses to close. The info and location of controls is indicated in the manual that came with your unit.

Apr 12, 2017 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Opener will not reverse


FIRST YOU NEED TO RESET THE CHAIN .

Unplug power
Release the door from the opener close the door manually. take the chain loose and slide the traveler down to reengage with the trolley. Plug in power, run the unit with chain off untill it completes a clockwise cycle and stops. reconnect the chain and set tension.

Adjust the chain tension.

If it still moves 6-8 inches and flashes 5 times. the problem is in the rpm sensor.

Full diagnostics are in the owners manual - FREE at
http://help.chamberlain.com/help/en-us/InstructionManuals

Oct 06, 2008 | Sears Craftsman LiftMaster Chamberlain...

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