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I am having the same problem the garage door won't stay down. I have leveled the sensors light beams and make sure that nothing was in the path. I have the model where the light is on front end toward the garage door. I havae adjustment the setting on the left side with no results. I have also adjusted the settings on the back without sucess. I am at a loss what to do. You would think that it would be simple to adjust.

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The lights sensors are not the problem.

Garage door will reverse direction automatically if it contacts the hood of your car or a bicycle. Your garage door is coming too far down, impacting the concrete, and then reversing.

The fix is simple.

You need to adjust the tripper switch just above the garage door. When the door is closing, it trips a little lever that's attached to the center rail. It's just a little flipper with 2 wires connected to it.

Move this flipper switch back tower the closer mechanism about 3 inches >>> try garage door again >> and then adjust location of flipper until garage door works just right.

Posted on Oct 11, 2010

  • pisczak Oct 13, 2010

    I had a friend look at the garage door and one of the light sensors did not have any electrical tape on it so there was a short in the light sensor. So he is ordering a light sensor and will replace it.

  • Anonymous Oct 13, 2010

    I didn't know the light sensor was timed to reverse the garage door only when it approached the end of the closing cycle. Nor that a light sensor needed tape as long as the wires were separated ... however light sensors go bad and can be ordered on-line easily enough.
    Let everybody know if the replacement solution works by re-posting the outcome.
    Thanks in advance

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1 Answer

My garage door won't go down and keeps blinking 10 times.


first, hold the wall button down and do not let up and the door will close for you. second, one of the wires to your sensors is loose, broken or shorted out by a staple thru the insulation. you can bypass the sensors on a temporary basis while you find the issue, by jumping the sensor connections at the motor.

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The sensor light are different colors


The sensors are seeing something directly in line with the beam between the 2 sensors, or your sensors are not aligned so they point directly at each other.

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Garage door won't go down all the way and then reverses to open


Check that the wheels and bearings are turning freely and that the door is not cocking to one side when closing. If the wheels are catching because of bad bearings, because the tracks are out of true or because the door is not staying straight in the tracks, the motor thinks that the door is hitting a car or a person and reverses. One thing to try: disengage the motor and try moving the door through the full traverse. Most automatic doors have a pull-cord that disengages the door from the motor. CAUTION: You may need a friend to help with the door, because it could be surprisingly heavy,.

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Garage door goes up fine but when you press to come down it goes down one foot, seems like it hits something and returns.


There is a sensor which checks for obstructions, are you sure there is nothing impeding drive path?Inspect the drive path carefully. If it reaches a part of the drive path which causes it to slip or stick slightly this will tell it not to continue. Also but less likely have you checked that the optical sensor is clean and aligned. Make sure there is nothing blocking the optics.

Jan 17, 2011 | liftmaster Garage Door 1/2 Hp

1 Answer

Garage door won't close with remote and I have to hold the pad to make it go down, however it opens just fine.


Your safety reversing sensors must be connected and aligned correctly before the garage door opener will close. An obstruction in the path of the sensor will also cause your door to not close.

This sensor is an electronic beam, which is sent between two sending and receiving "eyes". These eyes face each other and are located just inside your garage door. They may need to be adjusted so the beam from the sending eye is properly detected by the receiving eye. Once the receiving eye "sees" the beam from the sending eye, a green indicator light will glow on the top of the eye. Tweak them a bit. If both lights do not come on you have bad sensors.

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1 Answer

1/2 HHP lift master. the motor acts like something is in the way


I am assuming the door wont close.

Your safety reversing sensors must be connected and aligned correctly before the garage door opener will close. An obstruction in the path of the sensor will also cause your door to not close.
This sensor is an electronic beam, which is sent between two sending and receiving “eyes”. These eyes face each other and are located just inside your garage door. They may need to be adjusted so the beam from the sending eye is properly detected by the receiving eye. Once the receiving eye “sees” the beam from the sending eye, a green indicator light will glow on the top of the eye.

Jan 03, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

When you push either the remote or the switch at the door, the garage door will go down almost to the bottom and then come back up and the light will blink several times. This does not happen all the time....


Your safety reversing sensors must be connected and aligned correctly before the garage door opener will close. An obstruction in the path of the sensor will also cause your door to not close.
This sensor is an electronic beam, which is sent between two sending and receiving “eyes”. These eyes face each other and are located just inside your garage door. They may need to be adjusted so the beam from the sending eye is properly detected by the receiving eye. Once the receiving eye “sees” the beam from the sending eye, a green indicator light will glow on the top of the eye.

Jan 03, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

My garage door will only go up, not down


The sensor should be replaced as a pair/set. One is a transmitter, the other side a receiver. Hope you replaced the right one with the right type. They have to be correctely aligned or they will NOT let the door go down.

Dec 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door goes up when I press the button, but not down


If when you close the door the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. Check to make sure the small light on each sensor is lit and not flashing. They must be pointed at one another to work properly.

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

3 Answers

My garage door opener reaches the laser beam and goes back up


Hi,
Have checked to make shur nothing on the Door is sticking out into the path of the beam. Most door I know of are set so that anythig breaking the beam, while the door is in motion, will send it back up. the beam dosnt stop being looked at till the doors been all the way closed for a second or two.

You might want to look at the part of the door that reaches the laser just before it goes back up, it dosent take much to break the beam, a piece of string could do it.

Hope this Helps
Gem

Jul 02, 2009 | Sears Craftsman LiftMaster Chamberlain...

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