Troubleshooting a Smoke Detector

26 Questions

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August 17, 2011

Our only smoke detector is hard-wired into the ceiling. We have had 2 different smoke/CO detectors with battery backup. When a new battery is placed, it is fine for a few hours and then dies, causing the detector to chirp.


Is the electrical wiring somehow drawing power from the battery? Two completely different detectors have done the same thing, so I don't think it is a defective detector. I think there used to be another detector in the basement. I don't know if it was hard-wired or not, but we replaced it with a plug-in type. Any information would be great!

By Sarah


November 5, 20110 found this helpful

Its probably wiring. Make sure the hot and the neutral wire are not swapped or on the battery wiring check for bare spot that might be going to ground or grounding.

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July 28, 2014

I have five hardwired smoke detectors with battery backup. I changed the batteries today, four of them show a green light and one has a flashing red light; it's not beeping.

By Dean F.

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August 15, 2012

It can drive you to distraction, the constant unexplainable beeping of an electric smoke detector. Often it just needs the battery replaced but it may be a signal that it needs greater attention. This is a page about troubleshooting ideas when an electric smoke detector won't stop beeping.

Electric Smoke Detector

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June 26, 2017

There are a number of factors that can cause that annoying beeping of your smoke detector. This is a page about smoke detectors beep when the temperature drops.

Smoke Detector

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ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.

December 31, 2010

My hard wired smoke alarm went off last night. What is considered chirping when the battery is low?

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April 16, 2010

My smoke alarm started going off recently for no apparent reason. When I fan it with a towel, it stops. Any ideas?

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January 5, 2010

My husband bought a new smoke alarm about a year or two ago. I can't find the instructions that came with it.

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August 25, 2008

I have 4 electronic smoke detectors with battery backup on the same line. One detector beeps every 50 seconds non stop.

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March 11, 2008

I have a smoke detector problem. It keeps beeping off and on. I changed the batteries and it still will beep off and on.

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August 6, 2007

My smoke alarm is connected to electric supply and has started going off for no reason at all the last few days.

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