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Situation
The door opens but
won't close:
The door reverses for
no apparent reason
and opener light
doesn't blink:
The door reverses for
no apparent reason
and opener light
blinks for 5 seconds
after reversing:
The opener light
The opener strains or
maximum force is
needed to operate
door:
The opener motor
hums briefly, then
won't work:
The opener won't
operate due to
power failure:
The chain droops
or sags:
Having a Problem?
Probable Cause & Solution
1. If the opener lights blink, check the safety reversing sensor. See page 21.
2. If the opener lights do not blink and it is a new installation, check the down force.
See Adjustment Step 2, page 25. For an existing installation, see below.
Repeat the safety reverse test after the adjustment is complete.
1. Is something obstructing the door? Pull the manual release handle. Operate the door
manually. If it is unbalanced or binding, call for professional garage door service.
2. Clear any ice or snow from the garage floor area where the door closes.
3. Review the force adjustment procedures on page 25.
Repeat the safety reverse test after the adjustment is complete.
4. If door reverses in the fully closed position, decrease the travel limits (page 24).
Repeat safety reverse test after the adjustment is complete. The need for
occasional adjustment of the force and limit settings is normal. Weather
conditions in particular can affect door travel.
Check the safety reversing sensor. Remove any obstruction or align the receiving eye.
See page 21.
. . . doesn't turn on:
Replace the light bulb (75 watts maximum). Use a standard neck garage door opener
bulb if regular bulb burns out.
. . . doesn't turn off:
There may be a defective ground at the ceiling or wall receptacle. The unit must be
grounded.
The door may be out of balance or the springs are broken. Close the door and use the
manual release handle to disconnect the trolley. Open and close the door manually.
A properly balanced door will stay in any point of travel while being supported entirely by its
springs. If it does not, disconnect the opener and call for professional garage door service.
Do not increase the force to operate the opener.
1. The garage door springs are broken. See above.
2. If the problem occurs on the first operation of the opener, door may be locked. Disable
the door lock . If the chain was removed and re-installed, the motor may be out of phase.
Remove the chain; cycle the motor to the down position. Observe the drive sprocket.
When it turns in a clockwise direction and stops in the down position, reinstall the chain.
Repeat the safety reverse test after the adjustment is complete.
1. Use the manual release rope and handle to disconnect the trolley. The door can be
opened and closed manually. When power is restored, press the door control button
and trolley will automatically reconnect (unless trolley is in lockout position.) See
page 28.
2. The Outside Quick Release accessory (for use on garages with no service door)
disconnects the trolley from outside the garage in case of power failure.
It is normal for the chain to droop slightly in the closed door position. Use the manual
release rope and handle to disconnect the trolley. If the chain returns to the normal
height when the trolley is disengaged and the door reverses on a one-inch board
(or a 2x4 laid flat), no adjustments are needed. (See page 10.)
(continued)
31
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