Sears 139.53636SRT, 139.53641SRT, 139.53525SRT SituationProbable Cause & Solution, Door opens but

Having a Problem? (continued)

SituationProbable Cause & Solution

The door opens but	1.	If the	opener	lights	blink, check	the safety reversing sensor. See	page 23.
won't close:	2.	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:

The door reverses for

no apparent reason

and opener lights blink for 5 seconds

after reversing:

The openerl_h_:

The opener strains or maximum force is

needed to operate door:

The opener motor

hums briefly, then won't work:

1.Is something obstructing the door? Pull the red emergency release handle. Operate the door manually, tf 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 29.

4.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•

Check the safety reversing sensor. Remove any obstruction or align the receiving eye. See page 23.

•..don't turn on:

Replace the light bulbs (75 watts maximum). Use a standard neck garage door opener bulb if regular bulb burns out.

•..don't turn off:

Is the Light feature on? Turn it off.

The door may be out of balance or the springs are broken. Close the door and use the emergency release 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 a professional garage door serviceman.Do not increase the force to operate the opener.

. 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 reinstalled, 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•

The opener won't 1. Use the emergency release to disconnect the trolley. The door can be opened and closed

operate due tomanually. When the power is restored, press the Wall Control push bar and trolley will

power failure:automatically reconnect (unless trolley is in lockout position.) 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 It is normal for the chain to droop slightly in the closed door position. Use the

or sags: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 11).

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