Minggu, 19 Januari 2014

on a nighthawk detector what numbers are considered unsafe?

kidde carbon monoxide detector 888 on smoke and carbon monoxide alarm: Kidde KN-COB-B-LS Nighthawk Battery ...
kidde carbon monoxide detector 888 image



Nay


We have a Nighthawk carbon monoxide detector in our home. The number 8 just recently appeared on the screen. Should we be concerned? No alarm has gone off.


Answer
I just installed one of those the other day and I would have sworn that 8 was an error code that I got and that you just have to unplug the detector and plug it back in. But I just looked at the manual online and there is no mention of 8 being an error code. It does display "888" for a few seconds when you fist plug it in.

If it is steadily displaying an 8 then that is the level of carbon monoxide that it has detected since last reset. On the one hand that is a very low level and is safe - some references put the maximum continuous exposure level at 35 ppm and some say 50 ppm. Either way, 8 ppm is very low.

But then you have to wonder where the 8 ppm came from and if it is from a leak than may get worse over time. Having a CO detector is a good thing, it will make plenty of noise if the levels ever get to the point that you need to take action.

You could call Kidde at 800-880-6788 and talk to them if you want some reassurance.

Why does my Nighthawk carbon monoxide detector keep chirping every so often and reading 248 after I reset it?




Dragonlady


The last few days, the detector has chirped...does it for about an hour or less, every 30 seconds or so. Sometimes it stops for hours..even up to a day before it does it again. I've changed the battery twice. It came up low battery once...but was reading 0 the whole time the other times it happened. Then when I hit reset, it went to 888, then to 248 and once said 247. I don't understand this...makes me worry, yet it goes back to 0.


Answer
It suggests that there most likely is a malfunction if as you say that you've put new batteries in. It could also be an end of life warning (not yours, the carbon monoxide detectors'). If you've had the alarm for between 4-7 years this could be the case. People have had some problems with this particular model of carbon monoxide detector. It's probably best to contact the manufacturer directly, in this case Kidde, and if you have a valid warranty get them to send a new one asap. If not and your detector is in the end of life period it's probably better to buy a new one asap anyway. In the meantime it's better not to take any risks; make sure your house is well ventilated at all times.




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