When the opener is activated the screw rotates causing the nut to move until it reaches the switch.
Garage door moves few inches stops.
This helps you determine if the problem is related to the door or the motor.
My garage door opens about six inches and stops i press the my garage door opens about six inches and stops i press the button twice so it will stop going down and then is goes up another 6 inches or so.
If your garage door opener uses a keypad and that keypad stops working then there are a few things you can do to get it functioning again.
Genie garage door only moves a few feet and stops and when you push the button again it moves a few inches or a foot down.
If your garage door is stopping before it meets the floor watch this video for the fix.
It may be as simple as the floor limit switch getting hit incorrectly.
Sometimes the limit switch is activated by the movement of a specially shaped nut traveling on this track.
It passes a beam a few inches off the floor from side to side.
The garage door can be operated manually by disconnecting the garage door opener from the door using the red pull cord.
Same result with remote or wall switch.
There a few things that might be making it hard for your opener to lift the door.
The most common is a problem with the door balance.
Originally the plastic gear got chewed up so i replaced it.
Much of the door weight is held by the spring assembly if those springs are not adjusted correctly then there may be too much weight for the opener to handle.
After installing a new rpm sensor and new interuptor cup i still have the same problem the carrige only moves a few inches back and forth.
After installing new gear the garage door opener carrige only moved a few inches back and forth.
If the door is working properly it should be easy to lift by hand.
This read more.
If anything breaks the beam for a fraction of a second the door reverses.
The solutions firstly check that you re using it within the range required for your opener.
Open up the case and look for a screw type track that moves when the opener runs.