Having a Problem?

Situation

Probable Cause and Solution

The opener doesn ? operate from either the Door Control or the remote control:

1.Does the opener have electric power?. Plug a lamp into the outlet. If it doesn'tlight, check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.)

2.Have you disabled all door locks? Review installation instruction warnings on Page 11.

3.Is there a build-up of ice or snow under the door? The door may be frozen to the ground. Remove any restriction.

4.The garage door spring may be broken. Have it replaced.

5.Repeated operation may have tripped the overload protector in the motor. Wait 15 minutes. Try again.

Opener operates from the remote

control, but not from the Door Control:

The door operates from the Door

Control, but not from the remote control:

The remote control has short range:

Opener noise is disturbing in living quarters of home:

The garage door opens and closes by itself:

1.Is the Door Control lit? If not, remove the bell wire from the opener terminal screws. Short the red and white terminals by touching both terminals at the same time with a piece of wire. If the opener runs, check for a faulty wire connection at the Door Control, a short under the staples, or a broken wire.

2.Are the wiring connections correct? Review Step 6, page 18.

. Is any door push button flashing? If your model has the Lock feature, make sure the lock is Off.

2.Your opener needs to re-learn a remote control code. Refer to Instructions on the opener panel.

3.Program the receiver to match the remote control code.

4.Repeat the receiver programming procedure with all remote controls.

1.Change the location of the remote control in your car.

2.Check to be sure the antenna on the side or back panel of opener extends fully downward.

. Some installations may have shorter range due to a metal door, foil backed insulation, or metal garage siding. (Antenna Extender Kit 41A3504)

If operational noise is a problem because of proximity of the opener to the living quarters, the Vibration Isolator Kit 41A3263 can be installed. This kit was designed to minimize vibration to the house and is easy to install.

1.Be sure that all remote control push buttons are off.

2.Remove the bell wire from the Door Control terminals and operate from the remote control only. If this solves the problem, the Door Control is faulty (replace), or there is an intermittent short on the wire between the Door Control and the opener.

3.Clear memory and reprogram all remote controls.

The door doesn't open completely:

The door stops but doesn't close

completely:

1.Is something obstructing the door? Remove the obstruction or repair the door.

2.If the door has been working properly but now doesn't open all the way, increase the up force. See page 29.

3.If door opens at least 5 feet, the travel limits may need to be increased. One turn equals 2 inches of travel. See page 28.

Repeat the safety reverse test after the adjustment is complete.

Review the travel limits adjustment procedures on page 28.

Repeat the safety reverse test after any adjustment of door arm length, close force or down limit.

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Craftsman 139.53978SRT owner manual Having a Problem?, Situation Probable Cause and Solution
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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.
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