The sensors are alligned correctly and i took the cover off of it but i dont know what could possibly be wrong with it.

Garage door opener hums but does not open.
Is it all the way in the up open position.
This video animation applies to garage door openers that are adjusted using the limit screws.
Maybe it should be off center for all i know.
The motor hums when i press the garage door button but nothing happens.
Genie garage door humming sound.
Sears 41a3621 12 hp garage door opener which i believe corresponds to chamberlain liftmaster model series 1300.
I have a sears craftsman 13 horsepower garage door opener and after a while it has been doing this.
Not the garage door the opener trolley.
When someone calls us and says there garage door opener is just making a humming sound and the door is not opening we tell them it is probably either a stripped gear or a jammed carriage which is the part of the system that engages the chain or belt.
It makes a humming noise but doesn t open or close when i press the button on the wall.
When you find that your garage door motor is making a humming noise but not opening and closing it typically means that it has gone off track or needs some sort of small adjustment.
The black cam does not appear to be centered with the bolt in the middle.
The black thing if it is indeed a cam appears to be off center radially.
In order to get it back up and running again here are a few tools that you will need along with some steps that can help you through the.
Today we opened the door to its full open position but when we pressed the wall button to close door it would not close.
Every time we press the button the motor makes a temporary hum and then nothing happens.
Look at it closely ill bet it is jammed against the 516 bolt just in front of the motor unit.
Can it be the motor.
This would tell the garage door when it is fully open or fully closed and this should stop the motion of the door.
Any help is appreciated.
Because it hums when you try to open it the battery is working properly.
If so loosen the chain adjuster until it is no longer jammed against the bolt run the opener down a few inches and then unplug it.
Re tighten the chain then you need to back off the open limit on the left side of the opener so the trolley cant travel as far up again.
My garage door will not open.
This video animation is about troubleshooting a garage door opener that hums briefly.
If i put the chain back on while the motor is in the up position then the door goes down but it will not come back up.
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