During the summer, with electrical storms and voltage fluctuations, it is important to test your security system after every such event. Lightning is a very freaky thing. What can happen is lightning can fuse together the reed switches in your door and window sensors. When this happens, the alarm system thinks everything is fine, as there is continuity in the loop for that zone. Open a door or a window on the affected zone however, and nothing happens. That is why it’s important to put your system into test mode after every lighting storm and open and close every door or window on the system. If you open a door or window and nothing happens, give us a call right away so we can replace the sensor.