I did some searching on this forum and did not find anything quite like my issue:
Started installing my brand new SC1200 package, and at first all went perfectly. I paired both keychain remotes (KR10A) and and two door/window sensors (DS10A). The next day I decided I wanted all door/window sensors zoned by room. I cleared Zone 1 and 2 per the instructions, then tried to start adding them back by going into Install mode, pressing OK, when Zone appeared pressing 1, but the sensor did not seem to register as there were no tones. Tried adding the second one, then tried just adding letting the console choose the zone. Nothing. I then tried using the keychain remotes again, now they aren't working either. Went through all clear and reset options, no change.
Next I removed power and batteries from everything and let it sit at least 8 hours. Powered up the console, paired both remotes with no trouble. Took a brand new door/window sensor out, attempted to add it to Zone 3, and the problems started all over again. Nothing working, not even the keychain remotes which I had just paired and tested. Tried all resets again, no change. This time I did notice there is a very brief error when using Master Reset. I can make out "Error load..." but that's it. Not sure if relevant. Anyway I removed all power and batteries again, let sit for 5 hours, nothing would pair. Let it sit for over 12 hours with no power, still cannot get anything to pair. One keychain will not even indicate going into pairing mode as I do not see two flashes after holding Arm for 4 seconds. The other one did, but would not pair. Tried another new door/window sensor just for the heck of it, nothing.
Did I get a bad console and the rezoning problem was just coincidental?
TIA,
Dave