Chamberlain Garage Door Opener Blinking 3 Blinks Then Two Blinks: Troubleshooting Guide

A Chamberlain garage door opener is designed to provide convenience and security, but when it starts flashing error codes, it can be frustrating. If you’re experiencing the Chamberlain garage door opener blinking 3 blinks then two blinks, don’t worry—this is a common issue, and there are specific troubleshooting steps to resolve it.

This guide will help you understand why your garage door opener is flashing this error code and provide step-by-step solutions to fix the problem.

Read too: How Many Remotes Can A Chamberlain Garage Door Opener Have? Understanding the Limits and Options

Understanding the Chamberlain Garage Door Opener Blinking 3 Blinks Then Two Blinks

Most Chamberlain garage door openers are equipped with self-diagnostic LED indicators that help identify issues. When you see three blinks followed by two blinks, it usually points to a problem with the RPM sensor or travel module.

The RPM sensor (rotation per minute sensor) is responsible for tracking the movement of the motor and ensuring smooth door operation. If this sensor is malfunctioning or disconnected, the system will signal an error through the blinking pattern.

Possible Causes of the Blinking 3-2 Error Code

Several factors can trigger the Chamberlain garage door opener blinking 3 blinks then two blinks error:

1. RPM Sensor Malfunction – The sensor might be faulty or not properly connected.
2. Sensor Wire Damage – A broken or disconnected wire can cause the opener to stop functioning.
3. Obstructed Garage Door Movement – Physical obstructions can prevent smooth door operation, triggering an error.
4. Travel Module Issues – If the travel module is defective, the garage door opener might not function correctly.
5. Logic Board Problems – In rare cases, the opener’s logic board could be malfunctioning.

By identifying the cause of the problem, you can take the right steps to resolve it efficiently.

How to Fix Chamberlain Garage Door Opener Blinking 3 Blinks Then Two Blinks

If your Chamberlain garage door opener blinking 3 blinks then two blinks, follow these troubleshooting steps to fix the issue.

1. Inspect the RPM Sensor and Connections

Since the blinking 3-2 error code often relates to the RPM sensor, your first step should be to check if it’s properly connected and functioning.

Steps to Check the RPM Sensor:

1. Turn Off the Power – Unplug your garage door opener from the power source.
2. Locate the RPM Sensor – This is usually a small sensor near the motor shaft inside the garage door opener housing.
3. Inspect the Wiring – Ensure that the wires connecting the RPM sensor to the logic board are not loose or damaged.
4. Reconnect if Necessary – If you find a loose connection, securely reconnect the wires.
5. Power On the Opener – Plug the unit back in and check if the error persists.

If the sensor appears damaged, consider replacing it.

2. Check for Physical Obstructions

Your Chamberlain garage door opener may be detecting an issue with the door’s movement, triggering the blinking error.

What to Look For:

• Debris or Objects in the Tracks – Small obstructions in the garage door tracks can prevent smooth movement.
• Damaged Tracks or Rollers – Inspect for bent tracks or misaligned rollers that could interfere with door operation.
• Manually Operate the Door – Disconnect the opener and try moving the door manually. If it doesn’t move freely, there’s likely an issue with the tracks or rollers.

3. Reset the Travel Module

If the travel module is not working correctly, your garage door opener may display the blinking 3 blinks then two blinks error.

How to Reset the Travel Module:

1. Unplug the Garage Door Opener – This will allow the system to reset.
2. Check the Travel Module Wires – Ensure that they are securely connected to the motor unit.
3. Recalibrate the Travel Limits – Follow the Chamberlain manual instructions to reset the travel limits on your opener.
4. Reconnect Power – Plug the opener back in and test if the error has cleared.

4. Inspect the Logic Board

If the RPM sensor, travel module, and door movement are all working fine, the issue may be with the logic board.

Signs of a Faulty Logic Board:

• The garage door opener doesn’t respond to remote controls or wall buttons.
• The LED indicator flashes error codes even after troubleshooting other components.
• The opener randomly stops working and requires frequent resets.

If you suspect a logic board failure, you may need to replace the board or contact Chamberlain customer support for further assistance.

5. Perform a Full System Reset

If none of the above steps resolve the issue, performing a full system reset may help clear the error code.

Steps to Reset the Garage Door Opener:

1. Unplug the opener and wait for at least 5 minutes.
2. Press and hold the “Learn” button on the opener for about 10 seconds until the LED light turns off.
3. Reconnect the power and try operating the door again.

A reset can clear temporary errors and restore the opener’s normal function.

Preventing Future Issues with Your Chamberlain Garage Door Opener

To avoid encountering the blinking 3 blinks then two blinks error in the future, follow these maintenance tips:

• Regularly Check the RPM Sensor – Ensure the sensor is clean and properly connected.
• Keep Tracks and Rollers Clear – Remove debris and check for damage to prevent movement issues.
• Test the Garage Door Balance – A misaligned door can put extra strain on the opener.
• Inspect Wiring Connections – Look for loose or damaged wires in the system.
• Perform Routine System Resets – Resetting the garage door opener occasionally can help prevent errors.

By keeping your Chamberlain garage door opener well-maintained, you can prevent many common issues and extend its lifespan.

Conclusion

The Chamberlain garage door opener blinking 3 blinks then two blinks is an indicator of an issue with the RPM sensor, travel module, or door movement. By following the troubleshooting steps outlined in this guide, you can quickly identify and fix the problem.

If the issue persists after trying these solutions, consider contacting Chamberlain customer support or a professional garage door technician for further assistance.

Keeping your garage door opener in good condition through regular maintenance will help you avoid similar issues in the future and ensure smooth operation for years to come.