About 15 minutes ago, all the smoke alarms in my house went off at the same time. There was no smoke, fire, dust, or any logical explanation as to why all the alarms went off, let alone simulataneously.
10 minutes after the alarms went off, they suddenly stopped all. Then they started up again for a brief minute or two, and after that silence.The alarms are hardwired, on their own circuit, and have battery backup. I did not notice any power surges or anything out of the ordinary that could explain this.
If the batteries were all to fail, the alarms would chirp, not go off. If the power was to fail or blip, the alarms would make a brief beep.
My first guess is an electrical spike; however the lights did not flicker or anything. It could be that the smoke detectors were on a separate phase from the lighting circuit, though.
Any ideas?
73,Tim