First check the sensor lights.
Garage door opens intermittently.
This is almost always the result of a dirty or obstructed safety feature.
As these wires short against the housing the electrical impulse causes the door opener to activate.
Locate and eliminate the source of the rf interference.
Depending on the brand.
The garage door opener detects when it is getting too difficult to raise the door and automatically shuts down.
Simply put if the descending door hits an object the motor detects the resistance and the door opens.
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Adjust the degree of upward force which is one of the two adjustable screws on most garage door openers.
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.
As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
You push the button to close the garage door.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
The slightest detection such as accumulated leaves snow or ice around the garage door can cause the door to not shut completely.
If the remote works only when held within a few feet of the motor unit rf interference is probably the problem.
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.
Led lightbulbs are great but they may cause your garage door openers to stop working.
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It goes partway down reverses direction and goes back up again.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
Likewise if the beam of light between the floor sensors is broken the door will not shut.
When the garage door opener works intermittently the logic board may be experiencing radio frequency rf interference from nearby sources such as security lights ham radios and some electronics.