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.
Garage door chain working but will not close.
If your garage door won t close all the way the problem could be due to a blocked photo eye.
When the cord is pulled the motor is disengaged from the chain.
Press the remote or the wall mounted start switch listen to the motor and watch the movement of the chain.
First check the sensor lights.
Most garage doors have an emergency release typically a red pull cord that allows the door to be opened and closed manually.
The majority of garage doors manufactured since the early 1990s are equipped with this safety feature.
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The photo eye components consist of two pieces that align face to face across each side of the garage door roughly four feet above the ground.
Like mentioned above there are two lenses one on each side.
There s something wrong with the garage door opener that s stopping it from opening the door for you.
In most cases the cause will be a stripped gear or a chain that has come off the sprocket.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
Another thing that can prevent your garage door from closing are obstructions that are blocking the lenses.
Depending on the brand.
If something is blocking the safety beam then the garage door will not close.
If the motor hums but the chain doesn t move that indicates a problem with the motor.