I have a very old electric garage door opener. I don’t know exactly how old and that is apparently an important piece of information. Everything still works great except for the transmitters. I have been using the universal, learning transmitter built into my car, but now I need an regular, external transmitter. Searching around the internet has not helped much. The transmitters are no longer made, but I might be able to buy replacements if I knew the age of my originals. I have tried calling a few places and come up empty handed. I have a few more places that I can try calling.
Today I went out and bought a couple of different programable transmitters. This one which has 9 2-way DIPs and 4 2-way DIPs for selecting the brand. And this one which has 9 3-way DIPs. Unfortunately, my transmitter and receiever only have 6 2-way DIPs. I’ve tried setting the extra 3 DIPs to all positions, but that didn’t work.
The opener is an ElectroLift Executive manufactured by Chamberlain and distributed by Sears. Main model number is G-6446, remote transmitter is G-3446, and receiever is G-2446. I have the original manual, but there is no date listed.
Does anyone have any ideas? Perhaps someone knows the protocol and can suggest what to set the DIPs to. Or perhaps someone can help me pinpoint the age? I realize that I can replace both the transmitter and receiever with a new kit, but I would like to minimize the money I spend since I am selling the house (hence the need for the external transmitters). Finally, is it possible to buy an external, universal, learning transmitter like the one I have in my car?