Troubleshooting a LiftMaster opener with a flashing light involves inspection of the safety-reverse sensing system. * The 889LM control panel, which is a replacement to 888LM, is out of stock. myQ App Help & Customer Support. In this article, you will discover 4 common problems that may prevent your Liftmaster remote from working properly. Please refer to the product page for updates, click here. I have had numerous problems which the "battery" in the 888LM which I hoped the updated model would resolve. Fortunately, there are a few simple reasons that might be causing this problem. Liftmaster remote not working? We hear from customers every now and then who have discovered their remote doesn’t seem to be working properly. An open door will not close if the infrared beam is broken. If you need help with your myQ app or smart equipment—whether it’s installation, connectivity or features—we have you covered. LiftMaster MyQ Installation Guide After the yellow light is on at the internet gateway, go to the garage door is compatible. If you need a premium radio system to address any interference problems or to get better range, the LiftMaster 888LM should solve your dilemma. Our myQ support guides and resources cover a variety of topics to help you troubleshoot any issues and get peace of mind. MyQ Control Panel (888LM) and push the learn button twice. Upgrade your LiftMaster Security and garage door openers with the LiftMaster 888LM MyQ Control Panel, which will give you the updated Security + 2.0 radio and MyQ technology. Product description shows replaceable battery which the one I received does not have. It includes: 888LM 889LM LiftMaster Security+ 2.0 MyQ Wall Control Craftsman Assurelink Sears 4.6 out of 5 stars 3. See GATE - CDO - 888LM and 889LM - Compatibility with commercial door and gate operators. LiftMaster motors will not operate when something obstructs the infrared beam between the safety sensors at the bottom of the garage door tracks.