To all consumers with phantom opening problems with their liftmaster garage door openers. I personally own 3 from the 8500 series and have been dealing with this phantom opening problem for years. Phantom opening is when your garage door opens and closes all by itself. Like many of you, I have come home and or woken up in the morning to find out that my garage door opened all by itself, VERY scary and unsafe for many obvious reasons. I have spent many HOURS of grief on the phone with their technical people and have tried many different attempts at fixing this including but not limited to changing remotes, rewiring, reprogramming, changing circuit boards etc. This morning, I was able to ‘catch’ the door going up and down dozens of times by itself which I captured on video.
The myQ wall control is the culprit people. I am an electronic technician by trade and decided to do a little troubleshooting myself. The copy and paste solutions the company keeps posting is a joke and they obviously have no respect for people’s time and safety. Call them and have them send you a new myQ programmable wall switch. I disconnected mine and the door stopped going up and down by itself. After dis-assembling I quickly noticed that capacitor C1 and C18 are leaking causing a short in the circuitry which is making the door go up and down. This is a common problem on electronic circuit boards nowadays and is most likely due to the cheap inferior capacitors being used. I would like to admonish the company for not figuring this out on their own and caring so little about the safety of their customers.