Manuals / Craftsman / Household Appliance / Garage Door Opener

Craftsman 139.53978SRT Test The Safety Reversing Sensor, Test the Safety Reverse System

Models: 139.53978SRT

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Adjustment Step 3

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 service is required ff the opener

closes the door when the safety reversing sensor is obstructed.

i The garage door opener will not close from a

 

 

 

remote control if the indicator light in either

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sensor is off(alerting you to the fact that the

sensor is misaligned or obstructed).

 

 

 

The garage door can be closed by pressing and

 

 

 

holding the Door Control push bar or button until

 

 

 

down travel is completed.

 

 

 

Adjustment Step 4

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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.

Adjustment:

If the door stopson 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 cause the trolley to move within 2-1/2" of the trolley stop bolt. If

necessary, lengthen straight door arm to maintain this minimum distance.

•When the door reverses on the one-inchboard, 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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(or a 2x4 laid fiat)

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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Craftsman 139.53978SRT Test The Safety Reversing Sensor, Test the Safety Reverse System, Important safety check
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139.53978SRT specifications

The Craftsman 139.53978SRT is an advanced garage door opener that combines reliability, performance, and ease of use. Designed to cater to the needs of modern homeowners, this model stands out with its robust features and technological innovations.

One of the key highlights of the Craftsman 139.53978SRT is its powerful motor, delivering a peak horsepower equivalent to ensure smooth and efficient operation. This allows it to effortlessly lift even the heaviest of garage doors, making it suitable for various types of residential garage doors. The quiet operation of this opener is another major advantage, allowing for a peaceful environment in and around the garage.

Another notable feature is the smart technology integration. The Craftsman 139.53978SRT is compatible with a range of smart home systems, allowing users to control their garage door remotely via a smartphone app. This feature not only adds convenience but also enhances security, as users can receive alerts and notifications about the status of their garage door, ensuring peace of mind.

Security is a priority with this model, which comes equipped with rolling code technology. This mechanism generates a new code each time the remote is used, preventing unauthorized access and ensuring that your garage remains secure from intruders. Additionally, the enhanced safety features include safety sensors that detect obstacles, automatically reversing the door's movement if something is detected, thereby preventing accidents.

Installation and setup are straightforward, thanks to the user-friendly design of the Craftsman 139.53978SRT. The unit includes detailed instructions and all necessary hardware for installation. Many users can set it up within a few hours without the need for professional assistance.

With a durable construction, the Craftsman 139.53978SRT is built to last. It has a sleek design that complements various home aesthetics while withstanding wear and tear from daily use. Maintenance is minimal, with easy access to essential components for servicing.

In summary, the Craftsman 139.53978SRT offers a perfect blend of power, technology, and security features. Its user-friendly design, combined with smart technology compatibility and robust safety measures, makes it an ideal choice for homeowners seeking a reliable garage door opener. Whether you’re looking to upgrade an old system or install a new one, this model is sure to meet your requirements and enhance the functionality of your garage.