Craftsman 139.53663SRT Owner's Manual page 35

Situation
Troubleshooting (continued)
Probable Cause & Solution
The door opens but
,,on 't close:
1.
2.
If the opener lights blink, check the safety reversing sensor. See page 22.
If the opener lights do not blink and it is a new installation, check the down force. See
Adjustment Step 2, page 29. For an existing installation, see below.
Repeat the safety reverse test after the adjustment is complete.
The door reverses'for no
apparent reason and
opener lights" don't
blink:
1. Is SOlnething obstructing the door? Pull the emergency release handle. Operate the door
lnanually. 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 adjustlnent procedures on page 29.
4. If door reverses in thefidly closed position, decrease the travel limits (page 28).
Repeat the safety reverse test after adflJstments to force or travel limits. The needJbr
occasional adjustment of the force and limit settings is normal. Weather conditions in
particular can affect door travel.
The door reverses for no
apparent reason and
opener lights" blink for
5 seconds after
reversing:
Check the safety reversing sensor. Relnove any obstruction or align the receiving eye. See
pages 12 and 22.
The opener lights'...
don't tnrn on:
Replace the light bulb(s) (100 watts lnaxilnUln). Use a standard neck garage door opener bulb
if regular bulb bums out.
don't tnrn off"
Is the Light feature on? Turn it qff.
The opener strains or
maximum force is
needed to operate door:
The door may be out of balance or the springs are broken. Close the door and use the
emergency release handle to disconnect the trolley. Open and close the door lnanually. 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.
The opener motor
hums briefly, then
.,on 't work:
1.
2.
The garage door springs are broken. See above.
If the probleln occurs on the first operation of the opener, door lnay be locked. Disable the
door lock.
Repeat the safety reverse test after the adjustment is"complete.
The opener ,,on 't
operate dne to power
failnre:
1. Use the emergency release handle to disconnect the trolley. The door can be opened and
closed lnanually. When power is restored, press the Door Control push button and trolley
will autolnatically reconnect (unless trolley is in lockout position.) See page 32.
2. The Elnergency Key Release accessory (for use on garages with no service door)
disconnects the trolley froln outside the garage in case of power failure.
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