Beeping or chirping smoke ... For hardwired devices, use a screwdriver to loosen the screws holding the alarm wires in place ...

Observe electrical safety measures when installing hardwired smoke detectors. Never work on a live circuit. Test all wires and devices with the non-contact voltage detector before touching them.

Q: My home has hard-wired smoke detectors ... back of the new detector. Turn off power to the circuit, and confirm it’s off by checking the LED light; use a noncontact voltage detector if ...

Q: My home has hard-wired smoke detectors ... back of the new detector. Turn off power to the circuit, and confirm it’s off by checking the LED light; use a noncontact voltage detector if ...