If your old alarms are connected to three wires as shown here that means the alarms are interconnected when one alarm detects smoke they all howl.
Replacing hard wired smoke alarms.
I have several 10 year old firex hardwired smoke alarms in my home that i d like to replace.
Most hard wired smoke detectors have a connection from the electrical wires to the smoke detectors that engages and disengages.
When you disconnect the power to the circuit breaker the battery power takes over.
If possible refer to your smoke detector s user manual.
If you run into additional questions or are unsure about something seek confirmation before continuing the task.
Therefore the procedure should be done with caution and thorough attention.
You can do this too.
You simply disconnect the existing smoke alarm and pop in the new one.
New alarms are inexpensive.
This connection makes it simple to replace bad or.
Replacing a hardwired smoke detector requires removing the battery.
To be safe turn the power off first of course.
The detector begins to chirp to let your know the power is not on.
Replacing a hard wired smoke detector is almost as easy as replacing a battery powered version.
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It s like a plug.
Hardwired smoke detectors use a backup battery in case of a power outage.
Replacing a hardwired smoke alarm is a piece of cake.
If you purchase a smoke alarm from the same manufacturer you might be able to use the same wiring harness.