Keychain remote - can't change modes

I can’t change the working mode on one of the keychain remotes. I hold A + B buttons down together but the light never flashes, it remains off. How do I get it to work? The other keychain remote was successfully programmed. Pressing the A button or the B button shows are red solid light. Pressing A + B together, there is no light at all no matter how long I hold it.

You mean one remote in the 2-pack doesn’t change working modes?
If the other one successfully changed, it means your method is correct, then it might be the one doesn’t work is faulty.
Please visit orders management to see if the order is eligible to return, thanks.

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