What does a blinking light mean on a chamberlain garage door opener

How to know what the flashing LED lights on your Chamberlain, Craftsman, or Liftmaster garage door opener mean.

The Chamberlain, Liftmaster & Craftsman garage door openers have a built-in diagnostic indicator that will assist you in troubleshooting your garage door opener.

There is a LED light next to or near the smart button (programming learn button) on the outside of the motor cover up above the antenna. On the garage door opener pictured below the LED light is between the square purple smart button and the purple antenna wire. The LED functions as a diagnostic indicator by slowly flashing a failure code continually every eight seconds until the fault is corrected, the garage door opener is reset, or the necessary parts are replaced.

Table of Contents Show

How to know what the flashing LED lights on your Chamberlain, Craftsman, or Liftmaster garage door opener mean.
The Chamberlain, Liftmaster & Craftsman garage door openers have a built-in diagnostic indicator that will assist you in troubleshooting your garage door opener.
What does blinking light on garage opener mean?
Why is my garage door not closing and light flashing?
What does 5 blinks mean on Chamberlain garage door opener?
What are the error codes on a Chamberlain garage door opener?

Observe the flashing LED & count how many flashes occur in a row between pauses. Then refer to the chart below for the cause of your garage door opener not working properly. Once you have fixed the problem the opener will reset itself for most issues. However note below on the last two failure codes it does require that you manually reset the opener by unplugging the unit. If you still can not get the opener functioning properly after following the steps below you should contact a local garage door dealer for a service request to resolve the problem.

# of Flashes	Problem	Auto Reset	Manual Reset
1	Photo-Cell totally misaligned or Photo-Cell wire open	X
2	Photo-Cell wire shorted or the wire is reversed on the terminals	X
3	Wall button (panel) wire is shorted in wall or attic	X
4	Photo-Cell sensor slightly misaligned (dim or flashing LED on sensor)	X
5	Possible RPM sensor failure or motor overheated, unplug opener to reset unit		X
6	Motor circuit failure, replace main logic board		X
Rapid Flashing	This is not a problem but just an indication that the opener is receiving a signal but it will not respond to an unauthorized code

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What does blinking light on garage opener mean?

Having your garage door light blink continuously is not only annoying, it's also a sign that there is something wrong with the mechanism. There are several reasons why your garage door opener is doing this. The two most common reasons include a problem with the lock button and malfunctioning safety reversing sensors.

Why is my garage door not closing and light flashing?

When you see your garage door opener lights flashing and the garage door will not close, it could be the safety reversing sensors or the LOCK button. If there is a safety reversing sensor issue, the main light(s) flash 10 times. Start with aligning the safety sensors.

What does 5 blinks mean on Chamberlain garage door opener?

If the garage door opener was unable to complete the setup process, the opener will time out and will respond by blinking the light relay five (5) times. Verify the safety sensors are installed, the LED's are solid and not misaligned or blocked, while force is being set.