Every false alarm from my system has been from the motion detector. There are no pets in the house or objects that can be moved by blowing air. I specifically noticed the most recent false alarm occurred when someone armed the alarm and exited from the area covered by the motion detector. I cannot remember if this was the case with prior activations. Some reviews on Amazon essentially say that if you arm your alarm and pass in front of the motion detector while you are still within the exit grace period, it will trigger and cause a false alarm. This certainly seems to be the case with my system. I checked my motion detector and it says the firmware is up-to-date. My battery is now low, but this has been an ongoing problem. I am going to replace the batteries and do some tests on my own. Any suggestions would be appreciated because I’ve had it with this motion detector!