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How does a garage door know not to close if you push the button when a car is coming out?

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As far as i know all electric garage doors have sensors on both side of the door,and if the sencors are block the door will stop.if not hooked up could be dangerious.

Posted on Jan 15, 2013

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Not all garage doors have the feature but usually there is a sensor on the wall that the door is attached to. If a car or person sets off the sensor, the door "knows" to stay open.

Posted on Jan 10, 2013

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Fix my Craftsman 139.53973SRT garage door opener? When the button is pushed, the motor runs but the chain doesn't move. When I get on a ladder and try to pull the chain (help it along) it wil


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If not then your springs could be bad or not set to the correct torque.

If you can open and close easily the door then there could be a issue with the motor or the gearing. BTW sears does not make garage door openers. They have OEM's rebrand their with sear's label. You don't need to have sear come out maybe a generic garage door person or even a handyman. But unless it's under warranty it won't be free.

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How do i program my garage door to open with my car garage opener button


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1 Answer

I have Garage Door Opener from Sears. Wall push button & the the remote from my car open the door OK , but it does not close the door from my car (which is programmed) Wall push button close the door...


If the main light flashes 10 times when the door reverses to the open position it is a door sensor problem. Make sure the sensors are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have bad sensors.

Dec 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The door opens when i push to open but when i push to close it starts to close until i stop pushing the button. When i release the button the garage door opens back and clicks 10 times


Check the door sensors. They must be pointed at one another and the small light on each one must be lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have either a bad sensor or the wiring to them is shorted or broken.

May 11, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The door opens when i push to open but when i push to close it starts to close until i stop pushing the button. when i release the button the garage door opens back and clicks 10 times


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1 Answer

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I think the trolley has jammed against the bolt just in front of the motor unit. Remove the bolt and then run the door until it is closed. With the door closed locate the 'up limit' control on the side of the motor unit. Turn this 2 turns in the opposite direction of the arrow printed on the cover. Replace the bolt.

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1 Answer

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If the small light in your wall control is blinking it is in the lock mode. Press and hold for 3 seconds the button with the icon of a lock. This will toggle the lock function off.

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1 Answer

Have to hold the push button inside my garage to close garage.


You have a door sensor problem. Make sure the sensors are pointed at one another and the small light on each one is lit and not blinking. Also check the wiring.

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

1 Answer

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IF U HAVE TWO EYE,SENSORS ON EACH SIDE OF THE DOOR SEE IF SOMETHING IS BLOCKING THE EYES OR SOETHING IS COVERING THEM, OR THEY ARE OUT OF ALIGNMENT, ONE SHOULD SHOW GREEN, AND ONE RED EYE, GOOD LOCK

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