First Alert SC05CN Battery Operated Combination Carbon Monoxide/Smoke Alarm
by First Alert
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Tools and Hardware Reviews of First Alert SC05CN Battery Operated Combination Carbon Monoxide/Smoke Alarm
Customer Review: It works.
Summary: 4 Stars
Good price fair quality. Does not go off when I lightly burn my hot dogs.Like my old one did.Customer Review: Good, not great
Summary: 3 Stars
I replaced a hard-wired alarm that was 20 years old with an SCO5 that I bought locally (and paid more). It looks identical to the SCO5CN and may be identical. The only difference I can see in the description is that the CN version apparently has two different alarms -- mine has only one (three beeps for fire, four for CO). Two would be better. (The SCO7CN talks and tells you whether you have a CO problem or a smoke problem. You need to know the difference, because in the case of CO, you want to get the heck out of there, and in the case of fire, you want to find an extinguisher and put it out.)
I disconnected the old unit and took it down, capping all the wires with screw-on plastic wire nuts. This unit nicely fit the old junction box, so screwing it in was trivial. First Alert tech support recommended covering the junction box but that wasn't practical and I can't see how it makes a difference since there's a plastic base in the new unit that covers everything.
The good news:
The SCO5 looks nice and does double duty as a CO alarm. The smoke alarm is photoelectric, which is safer (no radioactivity) and less sensitive to false alarms from steam (it's outside a bathroom and, so far, no a false alarms). It attaches easily and bayonets off easily. You can change the batteries without taking the unit down, but frankly, it's not all that easy to change the batteries while looking up at the thing and I expect that I'll take the whole thing down to do it. It uses readily available AA batteries, but apparently can't use rechargeables. You're supposed to change them once a year, and it will beep at you if the batteries are low.
The bad news:
First, the instructions are just terrible, a jumbled mess. Way too much to wade through. Small type. Disorganized. Not simple at all.
Second, the alarm is SO LOUD! First Alert recommends that you test this thing once a week! To do that, you must hold down the plastic button for 3-5 seconds. The result is 3 blasts of the alarm for smoke, followed by four blasts for CO. You better wear strong ear protection when you do this because from the distance you will be standing, it will nearly blow your eardrums out. I didn't realize how many blasts were coming (bad manual!) and took my hands away from my ears too quickly. Big mistake! If it ever goes off, you have to hold that same button down, again for three to five seconds, to shut it down. That's a long time to stand near that much noise. Holding the button down takes some pressure and in the middle of a fire, I doubt that anybody will hold it down that long. It should shut it off instantly.
Finally, there is no indication that the machine is working -- no steady light or flashing light that says "all is well, I have power." Maybe none of the battery operated units do this, I don't know. One of the LEDs is labeled "power/smoke" -- but, as far as I can tell, it does nothing regarding power.
Last, a disappointment -- I would have preferred a unit that hooks up to AC power. I've got the hookup and would have used it. But as far as I can tell, nobody makes a combo smoke/CO alarm that uses photoelectric detection and also plugs in.
I'm reasonably satisfied with this thing but I expect that if it ever goes off I'm going to be heading to an ear doctor. And the manual needs a complete rewrite for clarity and simplicity.
Customer Review: Jumpy little fellow...
Summary: 3 Stars
Seems to work ok, except that it's over the sink and when we drain pasta it sets off the alarm... otherwise it seems alright. It scares my son when it goes off, so that's another plus, as I believe that is the desired result.Customer Review: great until it failed 2 months later
Summary: 2 Stars
I thought I got a great deal on this combo item, but it only worked for three months before failing. I guess when it comes to my family's safety I shouldn't be so concerned with the best price and just buy an item like this from a local store that I can return it to with no problems.Customer Review: Piece of junk
Summary: 1 Stars
I spent a good amount of time in the fire safety aisle of a local store, reading packages and comparing units before selecting this particular one to replace an aging smoke-only alarm. This one has two different-sounding alarms (3 beeps for fire and 4 beeps for carbon monoxide) and runs on 2-AA batteries. The batteries can be replaced without taking the unit off the ceiling and the compartment won't close without batteries in it. I installed it by myself in just a couple of minutes with a pencil, drill, hammer and flathead screwdriver. It has several features I chose not to use, most involve locking systems to prevent tampering, but it is nice that they are offered. Also has a photoelectric sensor claiming to prevent false alarms from food smoke and shower steam. I think it's a great value for my family's safety.
**(12/20/08)**I would like to amend my review. A week after installing, the alarm started "chirping" 3 times at irregular intervals (once at 4:00am Sunday, then Tuesday at 1:30pm). I changed the batteries after a third incident (again in the early morning) and it was fine for another four days. The next time I took it down and noticed the back indicates the 3 "chirps" is to replace the alarm. I have had the thing less than a month and have to replace it already?!?!? What a CROCK!
**(12/22/08)**I called and spoke to a rep from First Alert on the phone who explained to me the unit runs a self-test every 90 seconds and if it fails, the alarm 'chirps'. He asked me a few questions and promised me a new unit in a week to ten days.
**(1/14/09)** I received a new unit in the mail today, hard to install with my fingers crossed.
**(3/3/09)**Another malfunctioning alarm, at five o'clock in the morning. I am through with this junk!! Buy only if you want to replace every 4-6 weeks.