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I have old fire sentry smoke alarms model 1255. I cant remember how to open the bottom to replace battery. can you help

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Boy, once I heard detector is old, replace it now. Smoke detectors only last 7 to max 10 years.the radiation element part detector wears out. Not worth it trying to fix old technology. New ones aren't that expensive compared to your life.

Posted on Apr 30, 2017


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Deta fire alarm keeps goimg off and we cant remove It

Replace it. All alarms should be replaced after 10 years. Date is on the base.

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1 Answer

System is old need a replacement I can't seem to open, is there a battery replacement or a replacement alarm available

to open fire alarms twist the case to the left and it comes apart
consider this
if the alarm is old , it has been superseded with a better model that works on a different principle to smelling the air to detect smoke
Discuss the advantages of installing the new and different version with any fire prevention company or your local fire department
IN many instances a combination of both ensures protection of the people in the house

Dec 01, 2015 | Home

2 Answers

How do I make smoke alram stop going off when there is no smoke or fire.

If it does not have a battery backup there is a good chance it is over 20 years old and needs to be replaced.

Feb 21, 2015 | Home

1 Answer

How do I kow if there is a battery? I don't see one

Most units being made today have a battery backup. If the battery compartment is not plainly visible from the outside it could be underneath (also the location of the model number and date code). Most smoke/co alarms are removed from their mounted bases by turning counterclockwise, usually about 1/8 of a turn. If the device is more than 10 years old it (the entire unit) must be replaced per the National Fire Code, NFPA72. Otherwise, you my find the opening for the battery underneath as well. There are a few that do not have a battery at all. To be sure, locate the manufacturer and model number and check the appropriate website.

Oct 07, 2014 | Kidde Carbon Monoxide (KNCOBB) and Smoke...

1 Answer

The alarm keeps beeping batteries new

Batteries may have to be replaced even though new

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1 Answer

2 pcs. Installed all by the book but about every minute one of them gives a short loud peep.

Those alarms usually come with a cheap zinc carbon battery. This battery may already be weak especially if the alarm sat in a store for a long time. Try using a good alkaline or lithium 9 volt and see if that works.

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2 Answers

My smoke alarms which are also hardwired into the electrical system, are going off for no reason every 5 minutes

Your smoke alarms may be hard-wired and also have a battery backup. If this is the case, the batteries may need to be changed. If there is no battery issue, then it may be that the alarms have aged out and simply need to be replaced. Regards, Joe

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