John, We apologize you are experiencing Phantom Operation. There are a few things that can cause this type of problem. The most common causes are: possibly caused by a neighbor's remote being inadvertently programmed to your opener, a stuck button on a remote control, or a shorted wall-mounted door control sending unwanted signals to the garage door opener.
I just got a Chamberlain B750 @ Home Depot to replace my killed LiftMaster. It goes up while I'm gone. Surprised I still have bikes.
I wish my old LiftMaster remotes would operate it.
Maybe my old LiftMaster wall button will work better than the smart + fancy crap ? No it doesn't.
This is real B$
When my stuff is stolen I'm suing Chamberlain + Home Depot.
Our garage door opener is less than 1-year old and I am experiencing the same issue detailed above. I am shocked to learn so many others are as well, yet it seems this issue has not been addressed. Will someone from support please reach out to me immediately as I fear my home’s/family's security is at risk.
Scott Hedrick
Natasha Houston