I have a Liftmaster 8550WL so it's compatible. When I followed the instructions on T it didn't work. I spent a good hour trying to figure that out. I even watched their videos on You Tube, no it won't work. Finally I contacted someone on Liftmaster's "online chat" and then it finally worked. Here are the instructions and I hope it can help other poor fellows who are walking. in the same problem as us. I hope I can save you some heartache: - Steps: - 1. Make sure your garage door is closed before beginning the programming process.2. On the small remote control, press and hold one of the buttons (top or bottom) until the LED stops blinking and lights up. This will take 15 to 20 seconds, so be patient :). My fingers have a good practice at this step.3. After the blue LED lights up, press the yellow learn button on your Liftmaster. Press ONLY ONCE for the yellow light to toggle on and off. ---> DO NOT press twice to make the yellow light flash. ---> DO NOT long press the yellow button or it will disappear. all your other remote controls that you have installed.4. Double press any button on the mini remote (top or bottom) and you will notice the LED indicator flashes for a short time and disappears, then starts flashing again and disappears. This will continue for 60 seconds, during which time your remote will code itself as your elevator master, so be patient and let it do its thing. You will also hear a clicking sound and the lightbulb will also start blinking. Just let it do its thing until the next step happens. Don't press anything, let him understand.5. Once the garage door opens, press the button you want to program on your mini remote and press the button on the mini remote and the garage door will close again. Happy customer! Hope that helps!
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