Fixing the LiftMaster Error Code 4-6 | A Step-by-Step Guide

Is your garage door opener displaying Error Code 4-6? Don’t worry; we’ve got you covered! In this guide, we’ll explain why this error occurs, describe the behaviors of the door and opener when this error is present, provide symptoms and resolutions based on LED lights, and offer prevention and maintenance tips to keep your garage door running smoothly.

Why the Error is Occurring

The Error Code: 4 Up 6 Down is displayed when a specific condition from Error Code 1-1 or 1-2 exists, and the garage door opener is commanded to close. It’s important to understand why this error is occurring to effectively troubleshoot and resolve the issue.

Behaviors of the Door/Opener

When this error code is present, you may notice the following behaviors of your garage door and opener:

• The garage door starts fully open or in a stopped position.
• As the garage door begins to close, it reverses and goes back to the open position.
• The garage door may not move at all and remains in the open position.
• The Garage Door Opener will not close, and the opener lights flash or click 10 times.
• If no lights are installed, you will hear the opener click while attempting to flash the lights.

Symptoms and Resolutions Based on LED Lights

To diagnose and resolve the Error Code: 4 Up 6 Down, you can review the status of the LED lights on the Sending (Amber) and Receiving (Green) Sensors. Here are the most common symptoms and resolutions based on the LED lights:

Amber LED off, Green LED off

• Symptom: Sensors are not installed.
• Resolution: Install the Safety Sensors.
• Symptom: Sensors are not wired into the opener properly.
• Resolution: Connect wires at the opener properly.
• Symptom: Safety Sensor wires are cut or broken to Sending Eye.
• Resolution: Ensure wires are stripped back from insulation 7/16″ and perform a tug test to ensure the wires are seated properly. Identify cut or broken wires for the Sending Eye. If necessary, replace wires or sensors.
• Symptom: Safety Sensor wires are shorted.
• Resolution: Check if the home is pre-wired and make sure the same color wires are connected to sensors properly. Replace wires or sensors if needed.
• Symptom: Safety Sensor wires are reversed at sensors (Pre-Wired Home).
• Resolution: Check wires at each sensor and verify the correct colors connected to sensors (white and black).
• Symptom: Safety Sensor wires are reversed at Opener (Pre-Wired Home).
• Resolution: Check wires at the opener and verify if the correct wires are connected properly.
• Symptom: Safety Sensor wires are reversed at Opener (Non Pre-Wired Home).
• Resolution: Check wires at the opener and verify if wires are connected properly (white to white, black to black).
• Symptom: Safety Sensor wires are shorted.
• Resolution: Check for staples in wires and replace them. Perform a short wire test by wiring the safety sensors with a foot of wire and replace wires or sensors as necessary.

Amber LED on Solid, Green LED off

• Symptom: Sensors are obstructed.
• Resolution: Remove obstructions between the Safety Sensors.
• Symptom: Sensors are not aligned.
• Resolution: Realign the Safety Sensors. The Receiving (Green) Sensor should be on solid to indicate they are aligned.
• Symptom: Safety Sensor wires are cut or broken to Receiving Eye.
• Resolution: Ensure wires are stripped back from insulation 7/16″ and perform a tug test to ensure the wires are seated properly. Identify cut or broken wires for the Receiving Eye and replace wires or sensors if needed.

Amber LED on Solid, Green LED flickering

• Symptom: Sensors are obstructed.
• Resolution: Remove obstructions between the Safety Sensors.
• Symptom: Sensors are not aligned.
• Resolution: Realign the Safety Sensors. The Receiving (Green) Sensor should be on solid to indicate they are aligned.

Prevention and Maintenance Tips

To prevent future issues with your garage door opener, consider these maintenance tips:

• Regularly inspect the Safety Sensors for dirt, debris, and obstructions.
• Keep the sensor lenses clean and free from any obstructions.
• Check the sensor wires for damage and replace them if necessary.
• Lubricate the moving parts of your garage door opener as recommended by the manufacturer.
• Perform routine safety checks on your garage door and opener.

By following these steps, you can effectively troubleshoot and resolve Error Code: 4 Up 6 Down and keep your garage door functioning smoothly.

Conclusion

We hope this guide has been helpful in diagnosing and resolving Error Code 4-6 on your garage door opener. By understanding the reasons behind the error, recognizing the behaviors of the door and opener, and following the LED-based symptom resolutions, you can maintain a safe and trouble-free garage door system. Remember to perform regular maintenance to prevent future issues and ensure the longevity of your garage door opener.