I recently replaced an old Liftmaster opener with a new Chamberlain chain drive. After completing the installation, the trolly stops about 3 feet short of the stopping point on the track. The door closes fine. If I pull the emergency handle and disconnect the door from the opener, I can open and close the door just fine with no issues. I've tried adjusting the force limit settings on the opener itself, but this does not help. Any ideas?
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Chamberlain won't open all the way
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Force limits and open/close limits
There are two sets of limit adjustments. The blue dials are for the force. What you need are the open/close limits. This will be located on the side of the unit. If you have a unit with two lightbulbs it will be located on the opposite side of the motor from the force limits. Locate the one with the picture of a garage door and an up arrow turn this in small increments until your door opens to where you want.
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