Craftsman 139.53661SRT1 Garage Door Opener User Manual

Having a Problem? (continued)
Probable Cause & Solution
The door opens but
won't close:
If the opener lights blink, check the safety reversing sensor. See page 23.
If the opener lights do not blink and it is a new installation, check the down force.
See Adjustmenr 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 _ blink:
Is something obstructing the door? Pull the red emergency release handle. Operate
the door manually. If it is unbalanced or binding, call for professional garage door
Clear any ice or snow from the garage floor area where the door closes.
Review the force adjustment procedures on page 29.
If door reverses in the fully closed position, decrease the travel limits (page 28).
Repeat safety reverse test after adjustments to force or travel limits. The need
for 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. Remove any obstruction or align the receiving eye.
See page 23.
The opener light:
The opener strains or
maximum force is
needed to operate
... doesn,t turn on:
Replace the light bulbs (75 watts maximum). Use a standard neck garage door opener
bulb if regular bulb bums out.
•.. doesn_ turn off:
Is the Light feature on? Turn it off.
The door may be outof balance or the springsare broken. Close the door and use the
emergency release todisconnectthe trolley. Open and close the door manually. A properly
balanced door willstayin any pointof travel whilebeing supportedentirely by its springs.Ifit
does not, disconnecttheopener and call a professional garage door serviceman. Do not
increase the force to operate the opener.
The opener motor
hums briefly, then
won't work:
1. The garage door springs are broken. See above.
2. Ifthe problem occurson the first operation of the opener, door may be locked. Disable
the doorlock. If thechain was removed and reinstalled,the motor may be out of phase.
Remove the chain;cyclethe motor to the down position.Observe the drive sprocket.
When itturns in a clockwisedirection and stops in the down position, reinstallthe chain.
Repeat the safety reverse test after the adjustment is complete.
The opener won't
operate due to
power failure:
1. Use the emergencyrelease todisconnectthetrolley.The doorcanbe opened and dosed
manually.When thepowerisrestored, pr_ the DoorControlpush button and trolleywill
automaticallyreconnect(unlesstrolley isin lockoutpes_on.)See page 32.
2. The Emergency Key Release accessory (for use on garages with no service door)
disconnects the trolley from outside the garage in case of power failure.
The chain droops
or sags:
It is normal for the chain to droop slightly in the closed doer position. Use the
emergency release to disconnect the trolley. If the chain returns to normal height when
the trolley is disengaged and the door reverses on a one-inch board, no adjustments
are needed (see page I t).