I have an "Over Head Legacy Garage door opener. It sometimes opens on its own. I had an electrician come out and look at it. He took took it apart and cleaned it and put the antenna on the inside but it still does it. Granted it doesn't happen every day but once is too many times, I don't know how old the unit is since it came with the house. My home was built in '97 I moved into it in Oct. of '09. Could it be time to buy a new one? (experts only please)
It's possible that someone else in your neighborhood has a garage door with the same or similar wireless code. See if your model allows for the remote and receiver to be re-coded. To check if this is correct, drive or walk the block and try your remote in front of other homes. If it works, you may want to warn that person and see if he or she can change their remote code if yours can't. They may be wondering why their garage opens now and again as well! It's also possible that the switch on your wall is sticking intermittently and therefor is not releasing completely after it is depressed (and I don't mean sad). Try pressing it repeatedly to determine if it feels like it is returning smoothly. If it feels sticky at all make sure there are no obstructions around the edge of the button (dirt and grease buildup). If it looks clean, but still feels like it sticks a bit, try a little silicone spray (NOT oil or WD40 etc.) around the edge of the button to get it to move freely. Also, follow the wire from your wall mounted switch or any other switch that is attached to the opener. If you observe any breaks or kinks in those thin wires, you may find your intermittent problem there. If the switches are normally closed and the circuit is interrupted, it thinks the button is being pushed. If there is enough slack in the wire, simply cut and splice the wire and re-insulate it to re-establish the connection. Be sure to match the polarity which should be marked with a color or stripe on the insulation or possibly one silver and one gold tone wire inside the insulation. Hope this helps.
The last house we lived in which was new, we could open the garage door on the house diagonal to us. We were obviously set on the same frequency. Also did you know if your a fair distance away from your house but within view you can open and shut your garage door by simply holding the opener to the side of your forehead. Unbelievable , but it works. We have demonstrated to quite a few people. We also got a switch put inside the garage and when out or at night we turn it off so anyone with a scanner cannot open it.
The Legacy operator had problem when it first came out, one thing you can try hold down the learn code button found on the back of the motor head hold for 5 second and release then try your remote if the operator works try again 10 second this time and unplug the operator after you release the learn code button wait 15 second plug it back up and try your remote if you can open your door with the remote you need to buy a new operator Lift Master chain drive, But if you can't open your door go back to the learn code button and press in light will flash and press the remote button and release light will go out and you have reset the code on your operator you should have no more trouble if you do go buy a new lift master Good Luck
