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

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The garage door will oepn but only shuts 1/4 of the way. The both up & down force dials are on maximum. We haven´t been able to open or close the door properly once since the opener has been

We were given this garage door opener as a gift. My brother-in-law who is a professional electrican installed it for us. we ran into a problem with the door not wanting to close. The door opens but then only shuts 1/4 of the way & stops. It´s like it feels something is in the way but it´s not. My brother-in-law upped the dial on the down force control (blue button) & it didn´t help. Can you suggest anything else.

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  • gliptone May 11, 2010

    make sure the door in manual mode passes balance test .this is shown on installatio sheet. poor springs are a common problem

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  • Master
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Your RPM sensor is bad.

Posted on Jun 04, 2009

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We have installed the craftsman garage door opener and have continually adjusted the up and down travel limits and the door will not stay down


try adjusting the down force. the force necessary to may it reverse. it may be set too light. increase the down force and see if that helps. usually screw in back of unit. and usually labeled.

Jul 24, 2015 | Craftsman Garage Door Opener 1/2 HP Chain...

1 Answer

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

Liftmaster GDO goes up 1/2 way and stops,springs are fine.


The Liftmaster openers have 4 movement switches, a )opening and b) closing limit and c) opening and d) closing force. First check the door for smooth operation by opening the door by hand (disconnect from the opener with the release cord). Any binding should be felt this way. It is possible for a binding hinge, roller or torsion springs to add too much drag and cause the force switch to shut off the motor. Hinges, roller shafts and torsion springs should be lubricated at least annually with a non oily spray (silicone or teflon spray). Not WD-40 or 3-in-1! A light band of lube should be applied to the torsion spring coils. If the door can be operated smoothly by hand, then adjust the closing force switch 1/4 turn at a time. This is a safety device do not use it to overcome another problem!

Aug 15, 2014 | liftmaster Garage Door 1/2 Hp

1 Answer

What does the purple button light flashing on 1/2 horsepower craftsman garage door opener


I think the adjustment mode is on.

For example, that's from Craftsman manual:

""
Setting the Force
The force setting button is located on the left panel of the motor unit. The force setting measures the amount of force required to open and close the door.
1. Locate the purple button on the left panel of the motor unit (Figure 1).
2. Push the purple button twice to enter the opener into Force Adjustment Mode (Figure 2). The LED (Indicator Light) will flash quickly.
3. Push the remote control or control console (Figure 3). The door will travel to the DOWN (close) position.

""

Actually, you should just read carefully your garage door opener unit's manual.

Craftsman Garage Door Opener Remote

Jun 21, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door will only open half way. It appears to be getting stuck when it is opening.


If you haven't gotten your issue fixed yet... I had the same problem (stopped opening half way when using the remote, went down fine, could lift/close manually fine as well) and this happened on our first cold weather day of the year which was very telling. Anyhow, there are two gauges/dials on your garage door opener unit itself (above, where the light is) which controls how much torque/strength your door uses to open or shut through resistance. I turned mine up some and it now works fine; what likely happened was that the metal tracks or the wood frame condensed in the cold and was providing just enough resistance to stop it when opening - as they have a security device built in to stop if they meet any resistance. Hopefully this helps!

Oct 27, 2012 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door closes but bounced back immediately. No lights blinking, no obstruction, we turned the down forced clockwise, but unable to fix it. I did notice the roll bar is not stopping at the end of the track...


It is not the down force, but the distance the operator tries to push the door down. Sometimes this changes (I'm not sure why). Locate the dial on the opener that sets the down amount and reduce it. Once you get the door to stay down, check the down force again to ensure that it's not too much.
Gary

Dec 26, 2010 | liftmaster Chamberlain Garage Door Opener...

2 Answers

Door goes part way down; goes up before getting a 1/4 way down


If the main light flashes 10 times when the door reverses it is a sensor problem. If the door starts down and then reverses but the main light does not flash it is most likely the RPM sensor which is a small printed circuit board just in front of the motor.

Sep 19, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

6 month old garage door will work.


On the back of the opener near where all those white wires go you will find 2 controls. One is labeled "up force." Increase this about 1/4 turn.

May 18, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears Craftsman 3/4


Open up the caseand look at the travel assy. Sometimes the limit (up or down) do fall off the assy. Just snap it back on.

Jan 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

4 Answers

Garage door won't stay closed


Check the down limit:
 If the light bulb(s) on your operator are on the front and/or back, the limit adjustment screw is on the left side of the operator (looking from the back of the operator and facing  the garage door).. If the lights are on the sides of the operator then the limit adjustment screw is on the left side (looking from the back of the operator and facing  the garage door)

Jan 03, 2009 | Electrical Supplies

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