Originally Posted by Karter
I emailed them, was told to unplug the antenna, should solve the problem. Kudos to Rich M. for finding the antenna!!
I finally had a few minutes to look into this based on great suggestions from all of you - and a call to BF tech support to confirm. I'd like to compliment BF for great support. They didn't ask me to verify whether it was under warranty, and after asking a few questions, offered concise, clear advice.
If you unscrew the control unit from the wall and tug the cables out of the pass-thru hole a little, you will notice a black one that is larger diameter than the others. Tug it out a bit and there is a stereo-jack male/female taped together.
Untape and disconnect. Antenna is now disconnected. (FR should not connect the antenna, as it picks-up spurious signals.)