As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
Garage door pulley not working.
Garage door opener systems must be maintained to provide smooth operation throughout the years.
One of the more difficult problems for do it yourselfers to diagnose is a worn cable pulley on an extension spring door.
Opener systems can develop a number of problems including electronic problems with remote control units chain slippage faulty roller action and cables that come off the pulley system.
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When a garage door fails to open and close properly the cause is often a worn pulley.
There are of course many other problems that can keep your garage door from functioning properly.
To reprogram your garage door remote locate then press your opener s learn button.
Then within 30 seconds hold the button on your remote for three seconds or until garage door opener s lights flash or the led light on your opener blinks.
Usually the ball bearings break down causing the pulley to scrape against the track angle or the rivets fail and the pulley splits as in the picture above causing the door cable to stick.
Simple but true the remote transmitter needs power to send a signal to your opener.
Try using your remote to open or close your door to determine if the reprogramming was successful.
Maybe the garage door opens halfway and either stops or closes.
If pressing the button on your garage door s remote control doesn t work check the batteries first.
One major cause of failure for garage doors using extension springs is that the pulleys wear out.
Finally it s possible the garage door opener s motor.
Bottom of the door is up on one side.