I have a chain driven Chamberlain Liftmaster garage door opener. When I initially installed/placed the control module, I put it on the side of the garage door opener with a single strip of double sided tape placed horizontally on the back center of the module. After a couple of days, my garage door opener started making a loud noise. My immediate thought was the the opener was on its last leg and needed replacement (the unit is about 10 years old).
I went through and adjusted chain tension, lubricated the chain sprocket and sprayed oil onto the sprocket hub. I was still getting this loud noise. I took off the control module and walla, noise gone. The control module was vibrating so much that it produced a loud noise, The vibration movement was not visible to the naked eye.
I removed the tape I initially used and put 2 strips on the module on the back top and bottom of the module, again horizontally. Problem resolved.
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