Diagnostic Chart

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Your garage door opener is programmed with self-diagnostic capabilities. The "Learn" button!diagnostic LED will flash a number of times then pause signifying it has found a potential issue. Consult Diagnostic Chart below.

Safety reversing sensors

wire open (broken or disconnected).

Safety reversing sensors wire shorted or

black/white wire reversed,

®Symptom: One or both of the Indicator lights on the safety sensors do not glow steady.

-Inspect sensor wires for a short (staple in wire), correct wiring polarity

(blackJwhite wires reversed), broken or disconnected wires, replace/attach as needed.

• Disconnect all wires from back of motor unit

-Remove sensors from brackets and shoden sensor wires to 1-2 ft (30-60 cm) from back each of sensor

-Reattach sending eye to motor unit using shortened wires If sending eye indicator light glows steadily, attach the receiving eye.

•Align sensors, if the indicator lights glow replace the wires for the sensors. If the sensor indicator lights do not light, replace the safety sensors.

Door control or

wire shorted.

Safety reversing sensors slightly misaligned

(dim or flashing LED).

Motor overheated or

possible RPM sensor failure. Unplug to reset.

Motor Circuit Failure,

Replace Receiver

Logic Board.

0Symptom: LED is not lit on door control.

-inspect door control/wires for a short (staple in wire), replace as needed.

. Disconnect wires at door control, touch wires together If motor unit activates, replace door control

=If motor unit does not activate, disconnect door control wires from motor unit Momentarily short across red and white terminals with jumper wire. If motor unit activates, replace door control wires.

Symptom: Sending indicator light glows steadily, receiving indicator light is dim or flashing.

•Realign receiving eye sensor, clean lens and secure brackets

•Verify door track is firmIy secured to wall and does not move.

Symptom: Motor has overheated; the motor unit does not operate or trolley is stuck on stop bolt = Motor unit hums briefly; RPM Sensor =

Short travel 6_8" (15_20 cm),

-Unplug unit to reset Try to operate motor unit, check diagnostic code.

-If it is still flashing 5 times and motor unit moves 6-8" (15-20 cm), replace RPM sensor.

. If motor unit does not operate, motor unit is overheated.. Wait 30 minutes and retry.. If motor unit still wil! not operate repIace logic board

Symptom: Motor unit does not operate.

. Replace logic board because motor rarely fails.

139.53920D specifications

The Craftsman 139.53920D is a versatile and robust garage door opener, designed to provide both convenience and security to homeowners. Known for its reliability and advanced features, this model stands out in the competitive market of garage door openers.

One of the key features of the Craftsman 139.53920D is its powerful motor. With a lifting capacity suitable for most standard garage doors, it boasts a 1/2 horsepower motor that delivers the strength necessary to open and close heavy garage doors effortlessly. This ensures a smooth and quiet operation, minimizing noise disruptions, which is especially valuable for homes with living spaces above or adjacent to the garage.

In terms of technology, the Craftsman 139.53920D incorporates a range of advanced features aimed at enhancing user experience. It comes equipped with Craftsman's proprietary Triband technology, which operates on three frequencies, providing increased range and improved signal reliability. This technology minimizes signal interference, ensuring that the opener responds quickly to your commands, whether you are close by or parked at the end of the driveway.

Safety is also a critical aspect of the Craftsman 139.53920D. The unit includes an automatic reverse feature that immediately stops and reverses the door's motion if it detects an obstacle in its path. This is vital in preventing accidents and ensuring the safety of children and pets. Additionally, the opener is compatible with the Security+ 2.0 system, which offers rolling code technology that changes the access code each time the remote is used, adding an extra layer of security against unauthorized access.

Installation of the Craftsman 139.53920D is user-friendly, with clear instructions provided and all necessary hardware included. The unit can accommodate various garage door styles, making it a flexible choice for different homeowners.

Furthermore, the Craftsman 139.53920D offers smartphone compatibility through the Craftsman smart app, allowing users to control their garage door from anywhere, receive real-time alerts, and even monitor the status of the door remotely. This feature makes it easier than ever to ensure that your garage is secure, even when you're not at home.

In summary, the Craftsman 139.53920D is an excellent choice for homeowners seeking reliability, advanced technology, and convenient features in a garage door opener. Its blend of power, safety mechanisms, and smart technology makes it a standout option for enhancing home security and convenience.

Craftsman 139.53920D owner manual Diagnostic Chart, Symptom LED is not lit on door control

Models: 139.53920D