The battery compartment is located on the back of the unit, and to access it, you have to remove the smoke detector from its mounting bracket and disconnect it. To do this, twist the alarm 1/4 turn in the direction of the "off" arrow imprinted on the mounting plate, and when the ta...
depending on the size of the house and the number of rooms. A Firex smoke alarm is a very common alarm that can be battery-operated or hardwired. If you own the battery-operated one, you will need to know how to change the battery at least once a year. ...
For battery-operated smoke detectors, replace the batteries and try again. If it still doesn’t work, it may be time to replace the detector. If your detector is hardwired and the alarm doesn’t sound properly, call an electrician to check the wiring. If you can’t reach your alarm to...