We have a Merlin 230T garage door opener which randomly, sometimes opens on its own.

SOURCE: Garage Door doesn't close

I had the same problem and fixed it by greasing the chain and roller chamber and spraying silicone on the springs. Works beatifully now AND my wife is happy.

SOURCE: GARAGE DOOR OPENS BUT WILL NOT CLOSE AUTOMATICALLY

is bulb on motor flashing 10 times. then you have electric eye problem. otherwise, sounds like you need to increase down force a hair. adjustement is on logic board, right knob.

Mike Schmidt

• 227 Answers
• Posted on Feb 21, 2009

SOURCE: Garage door shakes as if off balance when closing

• The garage door may be out of balance or a spring may be broken. Close the door and use the emergency release handle to disconnect the trolley. Open and close the door manually. A properly balanced door should stay at any point of travel while being supported entirely by it's spring(s). If it does not, disconnect the garage door opener and call a garage door professional. Do not increase force to operate the garage door opener.

Glenn Mayer

• 91 Answers
• Posted on Apr 01, 2009

SOURCE: programing garage door opener remote

ok crystal,calm down this is an easy one! first locate the smart button on your openers , next you will press and hold down the smart button until you see an indicator light above it shut off, while your holding that button the light will be solid ,Now your ready to program your remotes ,first programm one side by taking each of your four remotes and pressing the smart button on machine then pressing the button on the remote you want to program,by doing that you will notice the lightbulbs on your machine shut off and go back on , This is an indicator that your machine has accepted the code , now do it with the other three remotes , after you,ve programmed all four ,go over to the other machine and repeat the process but this time you have to choose another button on your remotes since you,ve programmed all four remotes to the same button on each remote ,just choose the bottom button on your remotes this time to keep them seperated , hope this helps you and it is as easy as 1-2-3 your owners manual will describe exactly the same ,i know because i,ve installed over 27,000 machines working as an installer for sears, please leave a nice feedback rating if i was able to help you, good luck,Sincerely Glenn Mayer

SOURCE: Access Master Garage Door Opener opens by itself

The most common cause of this is a bad wall control or the wiring going to it. The wall control goes bad from use and the wiring sometimes has intermittent short caused by the staples the installer used.