Do Fire Alarms Go Off When The Battery Is Low. Most homes are the coolest between 2 am. This can happen for several reasons but it often means that your batteries are dying.
I tried all 3 batteries from the pack too and it still keeps. Take out its battery then press the Test button holding it down for 15 seconds. Thats why the alarm may sound a low-battery chirp in the middle of the night and then stop when the home warms up a few degrees.
If pressing the smoke alarm reset switch stops the madness go to step 3.
However the alarm might actually be signaling that something serious is happening. We put in new smoke detectors last summer one of the batteries started getting low so I replaced it. This battery characteristic can cause a smoke alarm to enter the low battery chirp mode when air temperatures drop. This is the case for some fire alarms.
