It may be piggy-backed onto a circuit with lighting. Pull the smoke detector down from its bracket and hold your pen tester to the wires to be sure that the circuit is off.

If you smoke detector is chirping or beeping, ... If the breakers aren’t marked, experiment by flipping lighting circuits until the smoke detector lights dim or all of the units begin to chirp.

Chirping smoke detectors light a fire in startup founder to build ultimate online guide to the devices. by Kurt Schlosser on October 18, 2024 at 7:42 am October 18, 2024 at 7:42 am.