I was also fortunate that the problem issues I was having were not as bad as some others have reported, namely the control panel shorting out and raising the door while no one is at your home or business. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Disconnect power. Note: The 888LM and 889LM* are not compatible with Commercial door or gate operators. Unplug the garage door opener and remove the battery if applicable. One exception is the ATS model commercial door operator. So, recently my control panel for my Liftmaster garage door opener learned a new trick, namely beeping a short pulse immediately followed by a sustained tone, seemingly at random and rendering my opener inoperable during these episodes. Change ), You are commenting using your Facebook account. I went ahead and fixed my existing 888LM anyways. One exception is the ATS model commercial door operator. Change ), You are commenting using your Google account. Change ), You are commenting using your Twitter account. Disconnect power. ( Log Out /  ( Log Out /  Here are some pictures of the old and the new. My garage door does not see a lot of use, so I got 4 years before mine started acting wonky. Here are some pictures of the old and the new. Note: The 888LM and 889LM* are not compatible with Commercial door or gate operators. A picture of the ‘improved’ caps on the replacement board from Liftmaster. Ruptured and leaking capacitors do not represent an optimal working condition. They may be low-ESR but I don’t care to bust a meter out to find out. After a lot of other troubleshooting and a lot of digging online, I discovered that a pair of 1F supercapacitors in the older 888LM units are guaranteed to fail almost 3 years after the control panel is installed. Unplug the garage door opener and remove the battery if applicable. Documentation of Stupid Electronics Projects. Some staining to the PCB, but the electrolyte didn’t have a chance to eat any pads or vias, yet….. New ‘no-name’ supercaps that will likely fail in 3 years, so I felt no desire to order top shelf components knowing that it is likely a poorly–engineered circuit design leading to component failure. ... To resolve issues with the myQ enabled door control panel. The 888LM allows you to control all your doors & home lighting systems. Create a free website or blog at WordPress.com. ( Log Out /  I initially just figured one of the photo eyes for the light beam were out of whack so I readjusted them back to specs with no improvement in my little issue. Change ). Liftmaster is well aware of this problem and are issuing warranty replacements with no questions asked, which is the right thing to do. This post has been more of a public service more than anything. ( Log Out /  Ruptured and leaking capacitors do not represent an optimal working condition. I went ahead and fixed my existing 888LM anyways. Other than the voltage rating on these new caps being 3V instead of 2.5V on the old caps, I see no immediate difference. Liftmaster is well aware of this problem and are issuing warranty replacements with no questions asked, which is the right thing to do. Discover the 888LM, garage door wall control from LiftMaster.

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