Question about Chamberlain 3/4-HP Power Drive Chain Drive Garage Access System
Something in the drive is jammed preventing the motor from spinning. Correct the problem lest you will burn out the motor if allowed to hum and overheat.
Posted on Nov 24, 2013
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Posted on Jan 02, 2017
I just had that problem this morning and the cause was that the springs that help hold the weight of the garage door were broken. This caused the garage door opener to raise the garage door a fe inches and then drop again. We called in a professional and $200 later we had new springs and everything works fine now.
Posted on Dec 17, 2009
SOURCE: door would not close all the way
DOES IT REVERSE OR STOPS BUT NOT TOUCHING THE FLOOR?
IF IT DOESN'T TOUCH THE FLOOR YOU EITHER NEED TO ADJUST THE DOWN TRAVEL OR LENGTHEN THE CONNECTING ARM.
IF IT REVERSES YOU NEED TO DETERMINE IF IT IS THE SENSITIVITY OR THE SAFETY EYES.
Posted on May 27, 2010
Where the belt attaches to the trolley carriage which attaches to the door there is a black adjustment nut with a spring on it. Tighten it up more by turning it clockwise until the belt tightens up. The belt will droop a little when the door is all the way shut normally but should not during operation. If you tighten it up too much the belt will slap on the rail during operation. Make sure the spring is set on the adjustment screw too. This holds the belt tight over time. Thanks BB
Posted on Oct 11, 2010
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