I have a chamberlain myq wall panel model 041A7928-3 and chamberlain myq gateway. They both works perfect until the wall panel makes triple beep sound during hot summer days. Turns out, after talking the tech, it has a defective parts and makes this noise when the garage temperature is above 90 degree. They send me a new Liftmaster model 888LM . This wall panel doesn't play well with my Chamberlain gateway. I can open the door, but it refuse to close, after the warning tone. I have talked to the first tech support and after an hour of trouble shooting, she decided to send me another unit. The second unit does the same thing. Called the tech again, reset the garage opener, reset the gateway, and same problem. I didn't give up and trouble shoot myself. Turns out, if I remove one of the LED light bulb from the garage opener, the door starts to respond and closes. Only one of the bulb is causing this issue. My old panel didn't have this problem at all. Just want to write this article so that in case someone runs into the same problem. This applies to old chamberlain gateway with new Liftmaster wall panel. I don't if replacing a new Liftmaster gateway would soft the LED interference issue. Will give it a try soon.