That all depends on how your opener programs - if its smart button learning or dip switch. http://www.clickerdepot.com/help-faq .. there is a good explanation there. You should also look at the instructions that came with the remote.
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I am not sure what brand your garage door opener is, but perhaps you should check with the company that made your particular garage door opener to make sure to get one that will work. If that is not an option for you, I did find that Walmart offers a universal garage door opener remote. Here is a link to the product: http://www.walmart.com/ip/Chamberlain-Clicker-Universal-Garage-Door-Opener-Remote-Control/10226394
In the instructions it should say how to program it to your own garage door. Much like a universal remote control for your television.
check out this link http://www.homelink.com/home/home.tml
One can find a Chamberlain Opener via the site of WallMart. Chamberlain provides state of the art garage openers that can be controlled with a compatible garage remote control.
There are several websites that have videos on Chamberlain garage door opener troubleshooting, Among them are YouTube, About, Amazon, and Chamberlain.
The garage door opener can be programmed into any car. The control works like a TV remote that is universal. The opener just needs to be mounted to the interior of the car.
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There are many people one can contact if their Chamberlain garage door opener stops working. One can contact the Chamberlain customer support department by emailing them through the official Chamberlain website.
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Chamberlain or Liftmaster for a keyless garage door opener?