Craftsman 139.53674SRT Adjustment Step, Important safety check, Test The Safety Reversing Sensor

Adjustment Step 3	I
Test The Safety Reversing Sensor

•Press the remote control push button to open the door.

•Place the opener carton in the path of the door.

•Press the remote control push button to close the door. The door will not move more than an inch, and the opener light will flash.

Professional serv.lce is required if the opener closes the door when the safety reversing sensor is obstructed.

The garage door opener will not close from a remote control if the Indicator light In either sensor is off(alerting you to the fact that the sensor is mlseligned or obstructed).

The garage door can be dosed by pressing and holding the Door Control push button until down travel is completed.

Adjustment Step 4	I
Test the Safety Reverse System

Test:

•Place a one-inch board (or a 2x4 laid flat) on the floor, centered under the garage door.

•Operate the door in the down direction. The door must reverse on striking the obstruction.

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Adjustment:

If the door stops on the obstruction, it is not traveling far enough in the down direction.

•Increase the DOWN limit by turning the DOWN limit adjustment screw counterclockwise 1/4 turn.

•Repeat the test.

On a sectional door, make sure limit adjustments do not force the door arm beyond a straight up and down position. See the illustration on page 26.

•When the door reverses on the one-inch board, remove the obstruction and run the opener through

3 or 4 complete travel cycles to test adjustment.

If the door will not reverse after repeated adjustment attempts, call Sears Service Center for garage door opener service.

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Important safety check

Repeat Adjustment Steps 1, 2 and 4 after:

•Each adjustment of door arm length, force controls or limit controls.

•Any repair to or adjustment of the garage door (including springs and hardware).

•Any repair to or buckling of the garage floor.

•Any repair to or adjustment of the opener.

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