Adjustment Step 1

Adjust the UP and DOWN Limits

Do not make any limit adjustments until the
Safety Reversing Sensors are completely
installed.
21
Limit adjustment settings regulate the points at
which the door will
stop
when moving up or down.
The door will
stop
in the
up
direction if anything
interferes with door travel. The door will
reverse
in
the
down
direction if anything interferes with the
door travel (including binding or unbalanced doors).
To operate the opener, press the Door Control push
button. Run the opener through a complete travel
cycle.
• Does the door open and close completely?
• Does the door stay closed and not reverse
unintentionally when fully closed?
If your door passes both of these tests, no limit
adjustments are necessary unless the reversing test
fails (see page 23).
Adjustment procedures are outlined below. Run the
opener through a complete travel cycle after
each adjustment.
Repeated operation of the opener during adjustment
procedures may cause the motor to overheat and
shut off. Simply wait 15 minutes and try again.
Read the procedures carefully before proceeding to
Adjustment Step 2. Use a screwdriver to make limit
adjustments.
Limit
Adjustment
Screws
Adjustment Label
Left Side
Panel
Cover
Protection
Bolt
2-4"

How and When to Adjust the Limits

• If the door does not
open completely
but opens
at least
five feet:
Increase
up
travel. Turn the UP limit adjustment
screw clockwise. One turn equals 2" of travel.
NOTE: To prevent the trolley from hitting the
cover protection bolt, keep a minimum distance
of 2-4" between the trolley and the bolt.
• If door does not open at least 5 feet:
Adjust the UP (open) force as explained in
Adjustment Step 2.
• If the door does not
close completely:
Increase
down
travel. Turn the DOWN limit
adjustment screw counterclockwise. One turn
equals 2" of travel.
If door still won't close completely and the trolley
bumps into the pulley bracket (see page 4), try
lengthening the door arm. (See page 20.)
If you have adjusted the door arm to the maximum
length and the door still will not close completely,
lower the header bracket. See Installation Steps 1
and 2, pages 8 and 9.
• If the opener
reverses
in fully closed position:
Decrease
down
travel. Turn the DOWN limit
adjustment screw clockwise. One turn equals 2"
of travel.
• If the door
reverses
when closing and there is
no visible interference to travel cycle:
If the opener light is flashing, the Safety Reversing
Sensors are either not installed, misaligned, or
obstructed. See Troubleshooting, page 18.
Test the door for binding: Pull the manual release
handle. Manually open and close the door. If the
door is binding, call for garage door service. If the
door is not binding or unbalanced, adjust the DOWN
(close) force. See Adjustment Step 2.
Adjustment Section: Pages 21 – 23
Improper adjustment of the travel limits could
interfere with the proper operation of the
safety reverse system.
The door might not
reverse properly when required and could
seriously injure or kill someone under it.
Test
the safety reverse system following all
adjustments to the travel limits. See page 23.
WARNING