Caps replaced. Reply. Choose a size and copy the code below to embed this guide as a small widget on your site / forum. Beeping like a fire alarm - That’s a battery that needs to be replaced. The troubleshooting guide said the main opener’s board was bad. You'll need to pry the PCB board up from the top and then pull up and out. Markus Lankeit - Also, the cap outline on the PCB has one side with a thicker line—that’s the negative side. I had a constant red/yellow light blinking and a beep coming from the unit. I ordered two off digikey, 1F 2.7V JUWT1105MCD. Liftmaster 888LM Capacitor Failure 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. Please refer to the product page for updates, click here. The great part about this feature is if anyone in the garage crosses the safety sensor beam, the door will not close. October 3 Products Affected: LiftMaster® MyQ Control Panels (888LM) LiftMaster ® recently discovered that a small percentage of 888LM MyQ Control Panels manufactured prior to mid-year 2015 act irregularly or stop working prior to their expected lifespan. If you have a myQ garage door opener, the wall door control panel uses a 2-way encrypted serial communication. Svalehome - Otherwise the beeping is because your safety sensors are not aligned. I heard a faint beep, so I went inside and found the wired opener (888LM) was blinking both red/yellow lights and beeping constantly. Remove those screws and pull up the back paper. I have the exact same model installed in 2016. And reinstall in reverse. Jonathan Hayward - We use cookies to give you the best possible experience on our website. It appears that Liftmaster bought a bad lot of capacitors. Look for the LED light on your garage door opener to see if this is the case. The unit requires approximately fi ve minutes to power up before it is fully functional. I had the two blinking lights as described, but no beeping. The PCB has +’s and -’s printed on the silk-screen (somewhat covered up since it’s 2 caps next to each other). Terms — I heard a faint beep, so I went inside and found the wired opener (888LM) was blinking both red/yellow lights and beeping constantly. myQ Door Control Panel Help. Here are a few reasons why your garage door opener might be beeping: 1. Liftmaster 888LM Capacitor Failure 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. If you hear a beeping noise from your garage door opener, there are a few different things you want to troubleshoot. Why is my Liftmaster beeping about every 15 seconds and the lights on the wall mount are blinking and my key - Answered by a verified Home Improvement Expert. My caps were not bulging, but one of them leaked fluid onto the pc board. Bulging caps were immediately spotted. Then slide the opener up the wall. Flip up the cover, remove the screw. Old ones were 1F 2.7v, just make sure they'll fit the space/holes as they are close together. My caps we're not bulging. (screw is marked). The reason for this is to warn anyone in the garage the door is about to close. Why is my Liftmaster beeping about every 15 seconds and the lights on the wall mount are blinking and my key - Answered by a verified Home Improvement Expert. Everything worked like a charm! The 888LM allows you to control all your doors & home lighting systems. Was this helpful? We use cookies to give you the best possible experience on our website. Eric M. Bright , We Don't Comprehend the Word Can't! It is not managed by iFixit staff. I have a liftmaster 8500 and one day I got home, the opener wouldn’t open the door. The reason for this is to warn anyone in the garage the door is about to close. Chamberlain or LiftMaster MyQ Garage Door Opener Beeping. If you’re using a Liftmaster timer-to-close or other similar technology, the garage door opener will beep to indicate when the door is closing. Reply. Super easy fix—Nichicon cap’s mentioned above from Digikey work a treat.