Question about Kidde Nighthawk Combo Gas/co Detector

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225 on kidde carbon monoxide detector

Monitor reads 225 on screen

Posted by Anonymous on

5 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 667 Answers

SOURCE: kidde Carbon Monoxide Alarms

YES!!!! If this unit is working properly you should not be in the house. Maximum allowable safety level for an 8 hour period is 50! If you think it's working properly call the fire department! This will cause dizziness,nausea,etc. Let your fire department find the problem! If you don't believe me follow this link to owner's manual but do it quickly:

Posted on Mar 13, 2008

  • 5 Answers

SOURCE: carbon monoxide detector err code

You are going to hate this as much as I did!
In the manual you will read this ..

Manual for Kidde Nighthawk C02 Detector
On page 13
Unit Malfunction
In the rare event that your alarm malfunctions,
it will alert you with a short “chirp” and the red
LED will flash once every 30 seconds. The
digital model will display “Err” as shown in
Fig. 6.
Seven years after initial power up, this unit will "chirp" every
30 seconds to indicate that it is time to replace the alarm.
The unit will not detect CO in this condition. Please replace

Posted on Dec 14, 2008

  • 43 Answers

SOURCE: My nighthawk Kidde carbon monoxide detector keeps

Some models of Carbon Monoxide Detectors will give an audible beep every 25-30 seconds after it has sounded an alert alarm. This may have happened when there was noone home to hear it. A periodic beeping sound may also indicate it is time to change the battery.

Solution: Install a new battery and check your manual for instructions on how to reset the system. Check the expiry date on your unit, it needs to be replaced after 5 to 7 years, according to the manufacturer specifications.

If you are in doubt that your Carbon Monoxide Detector is not working effectively, REPLACE IT. Your safety and your peace of mind is worth it.
View most Brands and Models of Carbon Monoxide Detectors online.

Posted on Jul 27, 2010

  • 1082 Answers

SOURCE: our kidde battery operated Carbon Monoxide

Relocate it to an area of fresh air - outside will work.. Does it still beep?
If yes, recover the new battery and toss the unit.

Do you have it located in a steamy damp area? Laundry room, bath room etc.. That will cause it to malfunction too..

Posted on Dec 03, 2010

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OSD (On Screen Display) lockout. To resolve the issue you can hold the power button of the monitor until you get another message something similar to "OSD unlocked"....if the problem continues. Switch of the monitor and remove the power cable and connect it again.

hope this helps and good luck with the problem and by the way don't forget to vote for this solution.

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Why has my samsung 225 got a blue tint

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Basic LCD monitor troubleshooting guide:

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én mechanikusan tudtam csak megoldani:
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Ezután egy csavart fogsz találni, ami az előlapot rögzíti. Kicsavarod.
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Sep 16, 2010 | Philips 190V6FB 19" LCD Monitor

1 Answer

I have a nighthawk carbon monoxide alarm which is showing nan error code. Please can you tell me what to do to rectify it? Thank you.

You can unplug the unit if it's an AC detector, change the battery for a new one and reset the Carbon Monoxide Detector. If that doen't work, you can have it checked by your local fire department. If the unit is more than 5 years old, it absolutely needs to be replaced.

Whenever in doubt about the efficiency of a carbon monoxide detector, a replacement is recommended. Yes, protection has a price, but a life cannot be replaced.

Read more industry information, buy your next Carbon Monoxide Detector here.

Aug 06, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Good Morning, My nighthawk CO detector went off with a loud continuous alarm this morning while all were sleeping. I reset it and it is not alarming now. I pushed the peak button and it reads 19. The...

When a carbon monoxide detector sends an alarm, there is cause for concern. You mentioned that the other CO detector did not go off, but maybe it is too far away to monitor the carbon monoxide levels that was in this area.

The instructions in your manual would direct you to evacuate the house immediately and ventilate. Your next step is to get a professional to inspect what may have caused the carbon monoxide leak.

A reading of 19 indicates that there is carbon monoxide in that area of your house, unless your CO detector is not working properly. Your local fire department will give you the best advice for what action to take when a carbon monoxide detector sends an alarm.

Be safe, don't assume a carbon monoxide alarm is cause by a defective CO detector, have it inspected.

Jul 30, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

My Kidde Nighthawk Carbon Monoxide detector was beeping shrilly and read gas. When pressed the reset button it read 221. Problem was it was sitting facedown in a box (i'd just taken it from my old...

A reading of 221 ppm carbon monoxide gas is a dangerous level that should be taken seriously. You could try a new battery and reset the detector. If in doubt, always err on the cautious side and have the apartment checked by a professional or by the local fire department.

A new carbon monoxide detector is a small investment that may prevent carbon monoxide poisoning or death.

Jul 22, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

How can I shut off my Kidde carbon monoxide detector when beeping

Here is the link to the manual for your Kidde model KN-COB-LCB-A
Carbon Monoxide Detector. This may help you solve your issue.

You may find more related information on my website. If you need a replacement or you need to add additional Carbon Monoxide Detectors in other levels of your house, you can purchase them here.

This issue should be solved immediately, Carbon Monoxide Poisoning can only be avoided by making sure you have good working CO Detectors in your house, camp or recreational vehicle.

Jul 24, 2010 | Kidde Nighthawk Combo Gas/co Detector

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