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Clutter or obstructions that block the sensor are the first problems to look for if your door won't close or, in extreme cases, open at all. First, check the sensor lights: Depending on the brand of garage door you have, one of the sensor lights may flash, dim, or go out completely when the beam is interrupted.
The problem is probably the opener safety sensors. Inspect the photo-eye sensor. The sensors are the small black boxes the near the bottom of your garage door frame which are usually installed on the tracks with a small bracket.
When the infra-red sensors are malfunctioning, usually one of the sensor lights will be blinking. The problem is either due to a blocked path between the sensors, dirty eyes, loose wires at the sensors or at the motor head, or just bad sensors. The transmitters (remotes) will not work to close the garage door. You will find that the door will only move an inch or so in the close direction and reverse. When this happens your garage door will only close by holding down on the wall button, or wall console, until the door fully closes. This method is the only way to override the safety and close the door.
1. Make sure that there is not something blocking the sensors from communicating with each other and the wire connections are securely fastened at the sensors and motor head, and the eyes are directed at each other. A lot of the time dust, spiderwebs, or even a small toy can block the sensors. If there is anything blocking the sensor remove it and try your door again.
2. If there is nothing blocking the sensors they maybe misaligned. They need to be pointed at each other in-order for they to work . If they are try to push alignment sensor into alignment. You will know they are aligned when the light stops blinking on the sensor.
3. Also, try unplugging the garage door opener and re-plugging the unit back into the outlet. This acts as a reset and may reset the sensors. If nothing works, it may be that you have to replace the sensors.
I would try closing the door, then power off and unplug the printer for at least a minute. This may clear out the error. If still no go, open the door and make sure there is nothing blocking the door from closing completely and also locate the door sensor and inspect for damage to the sensor as well as the part of the door that disables the senor / interacts with the sensor when the door is closed.
Too much tension on the door can make the "brain" respond by opening the door, thinks something is in the way.... check for binding tracks or wheel guides, loose bolts, dry chain, tension on cables or springs ( be careful here), misaligned sensors....
If the main light flashes 10 times when you try to close the door it is a sensor problem. Make sure the small light on each sensor is lit and not flickering ever so slightly. Tweak them a bit to see if you can get the lights on. If not you have a sensor that has failed.
Check your door sensors closely. Sometimes one will be off just a bit and the light will be on but blinking ever so slightly. If the main light flashes 10 times when the door reverses it is definitely a door sensor problem. Nothing else will cause that.
There should be 2 sensors on the bottom of your door on the inside, 1 on the right side and 1 on the left side. These sensors serve 1 purpose to send a beam or reflection to each other. If something is blocking this reflection or is in front of the sensor the door will always come back up. It is a safety feature so nothing or no one gets hurt when the door is closing!
There should be 2 sensors on the bottom of your door on the inside, 1 on the right side and 1 on the left side. These sensors serve 1 purpose to send a beam or reflection to each other. If something is blocking this reflection or is in front of the sensor the door will always come back up. It is a safety feature so nothing or no one gets hurt when the door is closing!
If any thing is blocking these sensors the door will not close! Make sure nothing is in the way not even a peice of paper.
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