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Re: door will not close
If it is a door sensor problem the main light will flash 10 times when the door reverses. Make sure the small light on each sensor is lit. One sensor is the sending unit and the light should be on all the time. The other is the receiving unit and the light is only lit when they are pointed at one another. If the main light doesn't flash it is another problem. Post back.
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You have a sensor circuit that prevents the door from closing. One sensor sends a beam of light across the floor by the door, the other sensor picks up the beam. If beam is interrupted, say by a car, the circuit prevents the door from closing. And if the sensors are not properly aimed it is as if you have an obstruction and the door will start to go down and then reverse it self.
Circuit only works for closing and not opening the door.
Adjust and hook up the sensors as per the intructions.
It is likely that the safety mechanism is being triggered. It thinks there is an obstruction. If there is no beam of light running across the front, it may be cheaper and easier to replace the operator than to service it. If there IS a beam, make sure it us not obstructed and that it hss not been knocked out of position. Feel free to contact me if you need more assistance.
Most likely your safety sensors are not aligned with each other or something is blocking them. There are 2 sensors, one at each side of the door. There are down next to the floor. They will normally be little black boxes that have send/receive sensors. They face each other and shoot a beam across the floor in order to make sure the doorway is clear when lowering the door. If they are not lined up or something is blocking them then the door will not lower. Just check to make sure nothing is blocking them. If not then check to see if the are "looking" at each other by checking to see if they are aimed at each other. There is usually a light on them that will turn green or light up when they are able to see each other. Once you get them aligned then the door should close.
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Check to see if your child/animal security beam is working correctly. It is an "Electric Eye" mounted about 12 in off of the floor on two mounting points and one side shoots an infra red beam across to a receiver. These points must be reasonably aligned to flash a beam (cannot see) from one point to another. This beam keeps the door open if it is interrupted . If it is not aligned, then the door opener sees a problem and will not close the door electrically. You must aligned the beam by bending the transmitter or receiver untill you can close the door by the remote. Also check to see if something placed in the garage is not blocking the beam first.
Make sure there is nothing tripping the IR beam at the bottom of the door. The beam is bounced back and forth between its source and a mirror about six inches off the ground. If something breaks the beam the door will go back up as a safety precaution. Also check to make sure there is nothing directly under the door that stops the doors from completely closing. Even a small rock can send the door back up.
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.
You have 2 floor photo eyes that run a beam across so that if a kid runs under the door it will go back up. If the door wont close and goes back up I would check to make sure those lights on the 2 photo eyes are lined up properly. Here is a link also Click Me If you cant get it to stay close there is a emergency cable that you can release to close the door until you can get it figured out. Lost of good info here as well. If this Info was useful please rate me and have a great day.
check to see if anything is blocking the beam that tells it something is in the way of the door closing. If there is nothing crossing the beam, make sure the beams are lined up properly. The four blinks are a safety feature so that you do not close the door on anyone or anything. Had the same problem myself once.