Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener
Door closes 85 - 90% and then reverses
how do we adjust this
Turn up the force adjustment or the bottom part of the door could be getting in the way of the photo eyes.
Posted on Jan 02, 2009
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Posted on Jan 02, 2017
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Nov 06, 2011 | Sears Craftsman LiftMaster Chamberlain...
force adjustments control the pressure used to open and close the
door. A new garage door opener from the factory is set to the lowest
possible force adjustment. If you have a properly balanced door, the
forces required to open and close the door should be minimal.
force adjustments are usually located on the rear of the garage door
opener and/or under one of the light lenses, If your opener has two
lights. If you have lights on the side of your opener, the force
adjustment will be located under the right light lens. The force
adjustments are labeled with an arrow indicating open or close and
numbered 1 to 9, with one being the lowest force and nine the
highest. The force adjustments can only turn 260 degrees, or ¾ of a
complete turn. Changes to the forces should be done in 10-degree
increments. Please remember that too much force will interfere with
the proper operation of the safety reversal system. Do not increase
the force beyond the minimum required to close the door. Do not use
the force adjustments to compensate for a sticking, binding, or
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