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oltom40

01:56PM | 04/25/07
Member Since: 04/24/07
1 lifetime posts
Bvwindows
I have two craftman 1/2 hp garage door openers, both manufactured in January 1996. After 10 years of working well, one had to be replaced. The problem being that the new remote will not code to the older second opener. Have tried all the tips, tried the tech support and never successful at fixing the problem nor was I able to talk to a human. Has the technology changed and the old not compatable with the new ?

Thanks for your help

OlTom

Billhart

03:37PM | 04/25/07
Member Since: 04/25/05
1916 lifetime posts
Actually there have been several changes

From 93 to 97 they used a Billion Code system at 390 mHz.

From 97 to 2005 (or early 2006) they used a rolling code system (Security Plus) at 390 mHz.

Then starting in early 2006 they used ERT system. The best I can tell the ERT system is basically as the Secuity Plus, except that it works at 315 mHz. But there might be other differences in details such as the type of modulation, but fuctionaly it is similar.

http://www.aaaremotes.com/liftmastercompatibilitychart.html

If you want to upgrade the old one to use the same remotes then you can get a kit.

http://www.aaaremotes.com/liungadooppl.html

Now the picture shows only the single button remote. But Chamberlain shows that they have the kit with a 3 buttom remote.

But if you have a pair of 3 buttom remotes with your new one you can get a receiver only.

http://www.aaaremotes.com/li315mhzenra.html
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