If the door simply stops short of the floor the likely culprit is the down limit switch.
My garage door stops short.
There are no obstuctions and this happens even with the trolley disconnected.
Have a helper steady the ladder.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
Set a safety ladder under the garage door opener.
In fact you really shouldread the entire garage door repair it will make troubleshooting later much easier.
Some models have two screws labeled.
Inspect the control wiring an exposed spot or a short circuit in the small gauge wire that leads from the garage door opener s motor unit to the control button on the wall may well cause your garage door to operate all on its own.
Also verify the antenna on the motor unit is in the proper placement.
Also i have checked the travel limit adjustments both up and down and checked kg pressure limits both up and down.
You can lengthen the open limit in the same way if the door doesn t open all the way.
My 1 2 hp garage door opener travels only a short distance then stops.
As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
If the door stops short of closing lengthen the close limit by turning the control knob in the direction indicated usually counterclockwise.
Finally it s possible the garage door opener s motor.
Remember that sometimes a garage door opener can increase the binding in a.
What should i check.
This did not affect travel of the trolley or door.
Be careful not to over adjust these controls or the pulley chain may slacken and come off the gear.
Place a stepladder beneath the box portion of the garage door opener.
Locate the limit switch adjustment either on the back of the opener or behind the light bulb s lens cover.
You may also need to reprogram your keypad or replace the batteries in it.
Garage door only travels a little way and then reverses does your garage door only travel a little way 6 inches or so and then reverse.