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I have a garage door opener. It appears to be an MSW GD-800 as per this link https://www.amazon.co.uk/MSW-GD-800M-Gar…. However it is red. Previous owner lost the remote controls. I have bought replacement Universal remotes at 315MHz and 433MHz but neither seem to be picked up by the unit when i switch it to remote learning mode. I suspect that it is some odd frequency but i don’t have an oscilloscope to determine what the receiver is. Maybe I’m doing something else wrong? The new remotes are designed to learn from the existing (lost) remotes. Maybe the new remotes don’t transmit anything without ’learning’ first? I’ve included pics. The oscillator circuit has what looks like a variable resistor with label r423. Does that mean 423 MHz? Any ideas how to get remotes that work or determine receiver frequency?
Hi @fixifynz A lot of garage door openers and similar devices have rolling code technology built in so that no one else can use a same brand or universal remote to open the door even accidentally e.g. two similar doors installed in premises next to each other. They still all work on the same operating frequency it is just the codes that continually change. If the control unit doesn’t get the code it’s expecting, it won’t respond I’m not sure how to overcome this except by replacing the control unit which would have its own remote with it, unless maybe there is a way to reset the control unit and then match it to the remote idk.
