Ok, thought I would update this thread about the Great Remote Receiver Hunt . First I must tell you that we spoke with the service manager at the place where we bought the RV. He had no idea and suggested we call Heartland. I did email heartland and they responded quickly and told us a few places to look for it. We looked and could not find anything. We then called them and my husband spoke to a very nice person who told him that production put these receivers in all kinds of different places in all different models and doesn't tell anyone where they are. (seems like a poor plan to me...). Anyway he gave us a few more places to look and guess what? no brain. By now my husband is going crazy looking for this thing and he is starting to take things apart with a screwdriver. Now below our refrigerator is a panel that opens and contains all the fuses and circuit breakers for the trailer. We must have opened and stared at this thing a dozen times looking for that brain, but all we could see were fuses and breakers, no big black receiver like in the picture. About 5 days into this treasure hunt my husband yet again opened that panel and noticed that a very small red light was on next to a fuse. He got down really close to it, (old people eyes), and next to the red light is written in ink "remote". So to wrap up, we changed out the fuse, remote now works perfect! So we never actually found the "brain" and we question if there really is such a thing.