3 False Alarms in One Night from Motion Detectors!
Our system has been working well for about six months with no problem. Last night, three false alarm from two different sensors! First one was in the garage, which was closed, no animals, door sensor not tripped, no heater vents, no sunlight. I.e. nothing could possible have tripped it. The second sensor was in a closed, unused bedroom. The door was locked (sensor not triggered), heater vent is closed, bedroom door was closed. I.e. nothing could possibly have tripped it.
One sensor could plausibly be defective. But two in one night? Impossible. This sounds either a software flaw, or sensitivity to some inexplicable RF signal.
A good night's sleep ruined, and now I don't trust the system. What can I do?