The springs are broken.
Chamberlain belt drive garage door opener maintenance.
The door needs lubrication.
Motor unit assembly parts rail assembly parts and installation parts for liftmaster belt drive garage door opener models 1270 1280 1280r liftmaster 1355 1355m 1356 1356m repair parts list and diagrams.
First check the manual release system by turning off the power of the belt drive opener.
Chamberlain s belt drive garage door openers minimize noise in homes with living spaces adjacent to the garage and are available with quiet or ultra quiet technology.
Our belt drive openers are available with features that include built in wi fi integrated video camera and battery backup.
The chamberlain gh line up includes industrial duty and heavy duty door operators.
The safety sensors are out of alignment.
Chamberlain gh garage door opener troubleshooting.
Chamberlain s belt drive garage door openers minimize noise in homes with living spaces adjacent to the garage and are available with quiet or ultra quiet technology.
The track is not aligned properly.
The batteries in the remote control need to be replaced.
If the belt drive malfunctions for some reason use the manual release handle to open the door.
For instance the gh model is a commercial door opener equipped with a maintenance alert system which signals when the operator needs immediate service.
Purchase a spray lithium lubricant from the market and use it on all the movable parts of the opener.