I installed the Protector Plus last year when I built a new house, fell in love with it, and then added more door/window and motion sensors. Everything works as designed. However, once spring sprang, I wanted to leave some screened doors open during the day. There is one door in particular that sends false signals, chiming as if the door was just opened (PS561 console is in Run2 position). I know this is not possible because I prop the door open and it's on the second floor with no access to stairs - just a deck. I have no kids or neighbors that would be pulling pranks (I've read many problems reported on this board). Dig this - I even swapped the sensor with one down stairs and this particular door (not the sensor) continues to cause false chimes as if the door was just opened. It is within 40 feet of the console, much closer than other sensors and has only a small 'beer' refrigerator 5 feet away between it and the console. The only thing I can think of is the problem door has a metal-framed sliding screen door on the outside that may be causing interference. But keep this in mind, the first floor has an exact model door (and screen) that does NOT have this problem. Any thoughts?