There are mainly two reasons for this occurrence and one of the reasons is depicted in this blog.
Garage door opener hums but does not work.
This could be the result of a faulty capacitor.
While this may seem like a no brainer one of the most common causes of garage door opener failure is simply the result of the power cord working loose from the electrical outlet.
This is to verify if the socket works.
You activate the door opener by either a remote control hand held unit or by pressing the wall button mounted on the wall and hear the motor humming but the garage door does not move.
A test will reveal whether or not it needs to be replaced but the test.
Detach the opener by pulling the emergency handle downward.
Consult a professional if the opener hums but the chain doesn t spin.
This did not fix the problem we check floor sensors both green lights are on there is not obstruction.
The first thing you want to check is the socket your craftsman opener is connected to.
So get a ladder and place it under the opener.
If the garage door opener is not powered up it won t work.
Unplug the garage door opener from the socket outlet and plug in another device.
If you are able to raise your garage door easily it is not the problem.
This indicates that something in the opener system has malfunctioned.
Contact us for garage door spring repair.
We looked through instruction manual which describes the opener motor hums briefly then won t work a check garage door springs they seem ok to us b disable door lock we pressed the lock button off and on via the wall unit controller.
The next thing to check is your home s circuit breaker or fuse.
If the garage door is not opening but the motor is running the problem might rest on the springs in your garage door assembly.
The next step is to attempt to open your garage door manually.