Why are my hard wired smoke detectors going off even though there's no smoke?

When multiple hardwired smoke detectors in a home activate simultaneously or go off in a false alarm even though the indoor air is completely clean, it is frequently caused by power fluctuations, dust-clogged sensor chambers, or a faulty interconnection wire. Hardwired smoke alarms are linked together via a communication wire; if one unit detects dust, insect debris, or experiences a power surge, it can broadcast an alarm signal to all interconnected alarms across the house, triggering a whole-house siren. You can troubleshoot linked alarms safely by locating the initiating unit with a flashing red LED. You can verify that your corrective action is successful when cleaning the sensor chamber of the primary unit or replacing a defective alarm stops the cascading false alarms permanently.