Liftmaster Opener Error Codes & How to Fix Them

liftmaster opener

Your garage door is a vital part of your home’s security system. Even more so, the opener is responsible for making sure the door performs its function of opening and closing on demand. If there are issues with the opener, you inadvertently are at risk of break-ins and other safety concerns.

Sometimes, you will experience error codes when you are using the opener. You might be able to resolve the issue easily or you may need the help of a professional garage door contractor to fix it.

Here are the most common Liftmaster operator codes, what they mean and what you can do to investigate the issue first-hand.

Understanding the Diagnostic Codes

First, you must understand the various diagnostic codes and what they potentially warn you about. Depending on your garage door opener model, you are likely to be alerted to a problem in a few ways:

  • Arrows: Security+ 2.0 opener models made post-2011 will have this feature, which is commonly found on most openers. Up and down arrows will flash repeatedly, pausing in between.
  • Learn button: This feature may not be available for opener models after 2022. If you locate this button on your opener and there is an issue, an LED light situated next to the learn button will flash, pause and repeat.
  • Sensors: You can can use the lights on the sensors to diagnose any issues on either or both sensors. A misalignment can be diagnosed if the green light is out on the receiving eye. The sending eye will have an amber-colored eye. If both lights are out then you might have a different problem. 

Additionally, your opener light will blink numerous times to indicate something is wrong, so watch out for both flashing indicators.

Liftmaster Error Code Meanings

There could be many reasons your Liftmaster is presenting error codes. In most cases, a few commonly recurring issues can easily be resolved without seeking external help. If any of the issues are not listed, you can consult your Liftmaster user manual for more extensive information on how to fix Liftmaster error codes.

Sensor Issues

One of the main reasons you may find an error is when there is an issue with one or both sensors. They could be obstructed, disconnected, misaligned or otherwise broken. It is important to see if the amber and green lights on the sensors themselves are lit to determine what could be causing them to malfunction.

If you see the following opener error code, check the sensors for obstruction, disconnection, misalignment or breakage:

  • Up arrow: 1x flash
  • Down arrow: 1x flash

Issues with the sensor most often result in the garage door not closing completely. Some common sensor issues include:

  • Obstructions: If there’s something in the way of the sensor, the door will not close. Remove anything that may obstruct the sensors. Temporary obstruction caused by someone walking past the sensors will result in the green light flickering briefly before resuming normal operations.
  • Disconnected sensor wires: The sensor wires that are connected to the opener may have been disconnected. Reconnect them and check if they work.
  • Misalignment: If the sensors get moved off track, they won’t function properly. Realign the sensors and look for a stationary green light and a stationary amber light to indicate successful realigning.
  • Broken or cut sensors: If the sensor wires are cut or broken, they won’t connect to the sending eye. Check if they are cut and replace them if they are.

short or reversed wires

Short or Reversed Wires

Where wiring is concerned, it is always best to do a thorough check to see that there are any signs of damage, fraying or disconnection at the sensors and the opener.

The opener error code for short or reversed wires looks like:

  • Up arrow: 1 flash
  • Down arrow: 2 flashes

You can identify this issue when the error shows for four seconds or longer. The garage door indicators are the same for a wire shortage as for sensor issues since they relate to the sensor and opener wires. The door will be open and when you command it to close, it will push up and stay open.

To fix this error code, check the wires at the sensors and opener to ensure they are properly connected. If there is a short, the wires will need to be replaced.

Door Control Panel

The wires on your door control panel may also short or come loose at some point, breaking the connection between the panel and the opener and preventing it from opening.

The opener error code for short wires on the door control panel is:

  • Up arrow: 1 flash
  • Down arrow: 3 flashes

This issue occurs when the wires short-circuit for four seconds or longer. Your remote will open the garage door, but if you press the control panel, it won’t react. You also won’t see any lights on the control panel. To resolve this issue, ensure the wires are connected properly on the opener and control panel. If there are any issues with the wiring, it’s often best to contact a professional for service.

RPM Issues

You may experience issues with the RPM sensor that could return multiple errors. They could relate to a lack of movement when you initially open the garage door or after the garage door motor switches off.

The opener error codes for RPM issues include:

  • Up arrow: 1 flash
  • Down arrow: 5 or 6 flashes

Remember, the arrows will flash repeatedly with pauses in between to differentiate the type of error you are dealing with. If the problem lies with the RPM sensor, the door will close despite the motor being off. If the manual release has come off, you can reconnect it. In the event that doesn’t resolve the issue, contact a service technician.

Logic Board Errors

Logic board errors may indicate the broadest range of errors since you could be having issues with the logic board for multiple reasons. This is characterized by the up arrow flashing twice instead of once, as you may have noticed with the previous error codes where the up arrow flashes once.

Any of the following opener error codes may signal an issue with the logic board or one of the parts on it:

  • Up arrow: 2 flashes
  • Down arrow: Between 1 and 5 flashes

The door may not open and close properly or even function if something is wrong with the logic board. Inspect the extra battery thoroughly and unplug the opener from the power source. If the issue persists, you may need professional help from a garage door contractor or a replacement logic board.

Power Loss

Sometimes, the power could trip without you knowing. You might think something is wrong when you see this error when there’s nothing to be concerned about.

Check for the following opener error code to see if it could be related to an electricity outage:

  • Up arrow: 3 flashes
  • Down arrow: 2 flashes

The door opener won’t function without an electricity source. Check if the power tripped or is out for some other reason and switch it back on. Alternatively, you could use the manual release to open and close the door until the power is restored.

If any other errors present and you have done all the necessary checks on the cable tensioner, rollers, springs and hinges you may have to consult an expert for advice on what could be wrong with your garage door.

quality garage doors

Let Quality Door Company Help You With Your Garage Door

Quality Door Company can help you clear Liftmaster error codes and resolve any other issues. We have an excellent team of expert technicians who are eager to sort out your garage door so you can get back to using it.

Visit one of our showrooms or warehouses to view our wide range of garage doors and openers and experience our top-class customer service first-hand. Or request an estimate or service online and we will get back to you promptly.


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