Troubleshooting the Liftmaster 8500W Garage Opener

The Liftmaster 8500W is a top-of-the-line garage door opener that is known for its reliability and durability. However, like any mechanical device, it can run into problems from time to time. In this blog post, we will discuss some common problems that you may encounter with the Liftmaster 8500W and how to fix them.

Error Codes

One of the first things to check if you are having problems with your Liftmaster 8500W is the error codes. The opener will display an error code on the LED light if there is a problem. Here is a list of the error codes and what they mean:

Diagnostic	Code	Symptom	Solution
Up Arrow Flashes	Down Arrow Flashes
1	1	The door operator will not close.	Safety reversing sensors are not installed, connected or wires may be cut. Inspect sensor wires for a disconnected or cut wire.
1	2	The door operator will not close.	There is a short or reversed wire for the safety reversing sensors. Inspect sensor wire at all staple points and connection points and replace wire or correct as needed.
1	3	The door control will not function.	The wires for the door control are shorted or the door control is faulty. Inspect sensor wire at all staple points and connection points and replace wire or correct as needed.
1	4	The door operator will not close.	Safety reversing sensors are misaligned or were momentarily obstructed. Realign both sensors to ensure both LED’s are steady and not flickering. Make sure nothing is hanging or mounted on the door that would interrupt the sensor’s path while closing.
1	5	Door moves 6-8″ (15-20 cm) stops or reverses.	Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock, correct as needed. Check wiring connections at travel module and at the logic board. Replace travel module if necessary.
1	5	No movement, only a single click.	Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock, correct as needed. Replace logic board if necessary.
1	5	Door operator hums for 1-2 seconds no movement.	Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock, correct as needed. Replace motor if necessary.
1	6	Door coast after it has come to a complete stop.	Program travel to coasting position or have door balanced by a trained technician.
2	1-5	No movement or sound.	Replace logic board.
3	1	The door operator moves slightly, then stops	Activate the door operator again. If problem persists, replace logic board.
3	3	The battery status LED is constantly flashing green.	Battery backup charging circuit error, replace logic board.
3	5	The door operator will not close or door reverses during travel.	If two cable tension monitors were previously installed and one has been removed, unplug and plug in the operator three times to relearn the monitor to the operator.
4	1-4	Door is moving stops and or reverses.	Manually open and close the door. Check for binding or obstructions, such as a broken spring or door lock, correct as needed. If the door is binding or sticking contact a trained door systems technician. If door is not binding or sticking attempt to reprogram travel (refer to page 19).
4	5	Door operator runs approximately 6-8″ (15-20 cm), stops and reverses.	Communication error to travel module. Check travel module connections, replace module if necessary.
4	6	The door operator will not close.	Safety reversing sensors are misaligned or were momentarily obstructed. Realign both sensors to ensure both LED’s are steady and not flickering. Make sure nothing is hanging or mounted on the door that would interrupt the sensor’s path while closing.
5	5	The door will not close when using Timer-to-Close or MyQ Smartphone Control	MyQ Remote LED Light must be installed to use TTC or MyQ to control the door. Plug in the MyQ Remote LED Light and make sure it is programmed to the garage door opener. NOTE: Light-Duty models do NOT require the MyQ Remote LED to use this feature, if you encounter this error on those models, replace the logic board.

• Code 1: Safety reversing sensor is misaligned or blocked.
• Code 2: Motor unit lock-out, caused by power unit overheating.
• Code 3: Motor unit lock-out, caused by too many attempts to open/close the door.
• Code 4: Remote control not programmed or not working properly.
• Code 5: Incorrect wiring or loose wire connections.

Common Problems and Solutions

1. Door not closing or opening: This is often caused by a misaligned safety sensor. Check the alignment of the sensors and make sure they are not blocked.
2. Door opens by itself: This could be caused by a malfunctioning remote control or a problem with the control board. Try reprogramming the remote control or consulting the owner’s manual for instructions on how to reset the control board.
3. Door makes a loud noise when opening or closing: This is usually caused by a problem with the opener’s gears or springs. Consult the owner’s manual for instructions on how to lubricate the gears or replace the springs.
4. Remote control not working: This is often caused by a dead battery or a problem with the programming. Make sure the battery is fresh and reprogram the remote control if necessary.

When to Seek Expert Advice

If you are experiencing a problem with your Liftmaster 8500W that you cannot fix by yourself, it is best to seek expert advice. Some problems, such as a damaged motor or control board, may require professional repair or replacement. Additionally, if you are not comfortable working with electrical wiring or mechanical parts, it is best to leave the repair work to a professional.

Conclusion

In summary, the Liftmaster 8500W is a reliable garage door opener that can be easily troubleshooted. Check for error codes, refer to the owner’s manual for instructions on common problems and solutions, and seek expert advice when necessary.