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Can't figure out how to change smoke detector battery

I don't have the manual so I loosened the unit from the wall to look at the back panel. It is hard wired with a battery back-up. The "plug in" part doesn't pull straight out--the edges fit into tiny slots on the side and there is a little flap that fits over the top part of the battery chamber. I can't get the battery out without getting the plug out of the way. I tried pulling the plug and sliding it up to disengage it, but no luck. The beeping is driving me crazy. Help!

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Oops you could have blown the board. do you have the origional mother board book that came with the board first day. If so check your wiring.

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SOURCE: smoke alarm/carbon monoxide detector

I have a First Alert Smoke Detector Model SA 86RAC.When I changed the Battery today it beeps.How do I fix this problem?

Posted on Jul 17, 2008

fixya expert
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SOURCE: how to remove sim card from sony ericsson k530i?

first slide the flap to some side and then pull it from top.

sony alone its different from others

Posted on Aug 15, 2008

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Two fire/smoke sectors occasionally beeping - no battery inside - connected to NetworX 1448E security system. We have changed the large battery in security - still beeping

If the units are more than 5 to 7 years old they have reached the end of life cycle and need to be replace. Smoke detector typically are only good for 5 to 10 years.

Sep 04, 2014 | Home Security

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How to remove battery from an old firex fx1218 smoke detector

I agree that removing the battery can be a pain.
As you look up at the FX1218, turn the smoke detector a few degrees counterclockwise.

The detector should fall from the ceiling and hang by a few wires.

Those wires are connected to a plastic connector. It's the plastic connector that has to be squeezed using pliers. I prefer slip-joint pliers (see picture).

remove-battery-from-old-firex-fx1218-pakrl1cso4l3msuzip5hmw52-1-0.png On the plastic connector you will see two plastic "arms". Squeeze the arms and the plastic connector and cover plate to which it is attached will come out of the detector exposing the battery. Be prepared for the detector to screech.

Replace the battery.

Reattach the connector/plate. It is keyed so it only goes in one way. Be careful no to bend the interior male pins into the female plastic connector.

Apr 24, 2012 | Home Security

1 Answer

Our carbon monoxide alarm went off for around 20 seconds until i lifted it to look at it. I hit reset button and it flashed up 237 and then went back to zero and has stayed that way...i had toast on at the...

Not likely the toast did it, Unless, you burned the toast or the detector was sitting right next to the toaster or the burned toast. If it is that sensitive, it will start falsing a lot. Placement of the detector is very important. Despite what the Owners Manual may say, it should not be in the same room as a gas appliance. At least not as a combo detector. Gas and co are two different things. They react differently when exposed to the air. Co is produced by incomplete combustion or smoke that fills a room and uses up all the oxygen. Gas (at least Liquid Propane Gas) is heavier than air. It doesn't rise, it falls.

So why have a combo detector that should be placed in a wall outlet, no more than 2 feet off the floor and expect it to quickly pickup carbon monoxide?

Quite frankly, these Kidde Combo Detectors have quite a long history of problems, Unfortunately, it doesn't seem to bother the manufacturer. They just keep producing them.

I have a total gas house, so to speak. Gas Heat, Vent-free Gas Logs in the fireplace, Gas Water Heater, Gas Dryer, Gas Range and a Gas Standby Generator. Do I have one of these detectors? No, because all my gas appliances have safety features buit-in by the manufacturers to shut them down automatically if something goes wrong. And all these gas appliances are serviced and tested at least annually. However, that's not to say I don't have Smoke Detectors. I do, 2 of them and they're placed in the sleeping areas of the house.

Sorry for the long diatribe. I have helped over 30 people who have had problems with this combo detector in the last 30 days. Some had to return theirs to Kidde for replacement, because they were constantly malfunctioning. I truly hope that not the case with yours.

My best advice is to clean the unit regularly as dust and lint accumulates in the sensor opening. You can clean it with a can of compressed air with a straw nozzle (like you clean your compute with). Take the battery out and you'll have access to be able to blow the dust and lint out.

I hope I have been able to help you in some way.

Feb 15, 2011 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Well, I replaced the batteries because the smoke detector was beeping, and it's still beeping even after the batteries were replaced.

In addition to changing the batteries, make sure they are turned the correct way to get proper polarity. Also, clean the unit using canned compressed air with the straw nozzle (like you clean your computer with). The sensor may be clogged with dust and dirt. Keep the canned compressed air as upright as possible when blowing out the detector.

Jan 25, 2011 | DSC Security System Wireless Smoke...

3 Answers

Periodically emits 3 loud beeps. Displays 888.

The CO detectors require replacement of the battery periodically.

Unlike smoke detectors, the detector element itself also requires replacement as well as the battery and is sold as a module with the battery attached.

May 02, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

I have 7 year old smoke and carbon monoxide alarm...I have put a new replacement battery and detector is chirping every 15 seconds or so

Check the expiry date on this unit. The manufacturer recommends replacement usually after 5 to 7 years depending on the model.

You bought a Combo Gas/CO Detector for protection against the hazards of Gas and Carbon Monoxide poisoning. A new unit will give you the peace of mind you are looking for.

Visit my website for more information and view most Brands and Models of Carbon Monoxide and Combo Gas/CO Detectors.

Dec 20, 2009 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Kidde smoke detector without a door or tab for back up battery - where do I find the battery so I can change it. It has been beeping for close to 39 hours. Installer did not leave a users manual. (The...

Some smoke detectors are AC-only, so there is no battery. Dual-power units typically have the battery compartment on the back of the unit, where it attaches to the wall or ceiling.

Most units must be removed from their mounting bracket to change the battery, as the battery cover is on the back.

You rotate the unit about 1/2 turn counter clockwise, and it should come off the wall/ceiling. If it has an AC power connection, you unplug that so you can change the battery more easily.

Oct 16, 2009 | Home Security

2 Answers

Kidde nighthawk Carbon Monoxide & Smoke Alarm single beeps

If detector is more then 5 years old it will beep every 30 seconde to wirn you the sensor in the detector needs to be replaced. bying a new detector would be better.

Sep 21, 2009 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Dsc sensor not operating properly. I want to change it, is this very difficult? Thank you.

You don't mention what type of sensor. I assume it is a motion detector. Before replacing I would strongly suggest you first remove all power from the system by disconnecting the backup battery inside the control panel then pull the system's power transformer which should be plugged into an electrical outlet nearby. You will know that all power is removed by looking at the keypad - all lights on the display are off. Next remove the motion detector's front cover. Some detectors have a small screw on the bottom so that when removed the cover pops off. Others need to be opened using a flat blade screwdriver and prying off the cover. Once the cover is removed there should be a 4 conductor wire that is wired to a series of terminals. Observe the polarity of the wires, disconnect them and remove wall mounting screws. Install new unit. Be sure when wiring to connect power wires correctly. The 4 conductor wire should have a red (positive) wire and a black (negative) one. Connect the red to the + or pos terminal and the black to the - or neg terminal. Read the instructions that came with the new unit if in doubt. When finished plug the power transfomer back in then reconnect the battery (in this order). If power is connected properly the motion detector's red walk test light (indicating motion) should light whenever you walk in the protected area. Also make sure the system recognizes motion by first closing all protected areas such as windows and doors to get a system ready or green light indication on your keyad, then walk around the protected area. A properly working detector will show you a fault on the keypad everytime the system senses motion.

Sep 11, 2009 | DSC Home Security

2 Answers

Beeped but we don't even have a gas line!

your thinking along the right line, combo units seldom work as single function units. keep in mind that a CO detector need to be replaced every 5 years on average. look at the date code on the new unit to make sure it reads good until or replace by 2012 of better.


Sep 06, 2009 | Kidde Nighthawk Combo Gas/co Detector

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