This problem bugged me for several months.
Garage door will open but not close.
Sometimes a garage door won t open or close for one reason only the operator has.
15 reasons why your garage door won t open or close 1.
If your garage door won t close all the way the problem could be due.
Hopefully after you read this you won t have the same problem in the future.
Depending on the brand.
This feature normally only fails when the door is already open and won t close but some models.
The operator receives no power.
If the beam is broken or the sensors are misaligned the sensor light s will go off and subsequently tell the operator not close the door.
One sends a beam of infra red light to the other.
This is one of the sensors.
If anything interrupts this beam of light the garage door will not close and the ceiling light on the opener mechanism will flash as mentioned in the previous step.
Don t just assume that if the path is clear that the sensors are ok.
The photo eye is blocked dirty or misaligned.
Turn the power back on and the door should open and close normally.
If your garage door opens ok but won t close then it s possible the safety reversing sensors are not correctly aligned.
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Check the door s electric eye.
The garage door may attempt to go down but will come right back up and the overhead light on the garage door opener will blink.