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.
Garage door moves few inches stops.
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.
If your garage door is stopping before it meets the floor watch this video for the fix.
Try to operate the garage door manually.
After installing new gear the garage door opener carrige only moved a few inches back and forth.
Originally the plastic gear got chewed up so i replaced it.
It passes a beam a few inches off the floor from side to side.
It may be as simple as the floor limit switch getting hit incorrectly.
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.
The solutions firstly check that you re using it within the range required for your opener.
This read more.
I researched that symptom on this website and was directed towards replacing the rpm sensor.
Sometimes the limit switch is activated by the movement of a specially shaped nut traveling on this track.
If the door is working properly it should be easy to lift by hand.
If anything breaks the beam for a fraction of a second the door reverses.
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.
When the opener is activated the screw rotates causing the nut to move until it reaches the switch.
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.
At the bottom of your door there s a small infrared sensor.
This helps you determine if the problem is related to the door or the motor.
Same result with remote or wall switch.