The Carbon Monoxide alarm is designed to reset automatically. Use the Test/Silence Button to quiet the alarm while the alarm is resetting. The only time the battery should be removed from the Carbon Monoxide alarm is when it is being replaced.
First Alert CO600 Plug-In Carbon Monoxide Detector
A: That is the power light. It is normally solid red and flashes when there is a problem.
Look for the detector that has a solid red LED light. That means it is the detector that is in alarm condition. Once you find it, remove that detector by unplugging the power to it and take the batteries out.
On First Alert carbon monoxide detectors, check to see if the battery light is yellow or green. If the alarm is chirping and the light is yellow, it means the battery is low. The way to get a carbon monoxide alarm to stop chirping is to replace the battery.
Find the Reset button. It's on the front panel, though the exact location and size of the button vary by brand and model. Press and hold the Reset button for 5 to 10 seconds. Release the Reset button, and listen for a beep.
To reset the alarm, the unit needs fresh air and time to burn the contamination off the sensor. Push and hold the silence button for 5 seconds to silence the alarm while contamination is being burned off the sensor. You may need to do this a number of times to give the carbon monoxide detector enough time to reset.
When the CO alarm emits a quick beep every 30 seconds and the red LED flashes, you may need to change the batteries. Replace the batteries in the alarm. If the alarm continues to emit a quick beep every 30 seconds and the red LED flashes, the alarm has reached the end-of-life.
First, look for a button called 'silence' or 'reset'. Hold this button down for 10 or more seconds. Release the button, and the LED lights should blink or turn back on. Your unit might also let out a singular beep.
Clear Residual Charge to Stop the Chirp
Remove the alarm from your ceiling or wall. Open the cover and take out the battery. Press and hold the test button for 15-30 seconds. This will fully reset the smoke alarm and drain any charge left inside.
Your alarm manufacturer may have included a blinking red light to let you know it's time to test the alarm again. The Batteries are Low: Usually accompanied by a loud beep, a blinking red light could mean the batteries in the unit are low. Consider adding fresh batteries and running a test to make sure it's working.
Many smoke detectors use an LED light to show you that everything's working properly. If your device's on/off button has a stale red light, it likely means the system is working properly. Some detectors will even use a light that flashes periodically to tell you they're working.
But in general, these lights are a power source indicator. If the light is blinking red, it may indicate a low battery life or power source connection issues. However, some models may use the light to indicate when carbon monoxide has been detected.
Check the Battery: Replace the battery and ensure it is installed correctly. After replacing the battery, observe if the red light returns to its normal blinking pattern. Clean the Detector: Use a vacuum cleaner with a soft brush attachment to clean the exterior and interior parts of the detector gently.
Carbon monoxide alarms alert you with four beeps. A single chirp means the battery is low or the detector should be replaced.
Press and hold the test/silence button for 20 seconds. You'll find this on the front of your detector. Reconnect all power sources (reconnect the wiring or plug back into the outlet). Your alarm should now be reset.
Normal operation when used with battery only, green LED off & red LED flashes once per minute. During testing, red LED flashes once per second and horn signals with 3 beeps, silence, then another three beeps. Low or missing battery (9120B only), red LED flashes once per minute and alarm "chirps" once per minute.
Unmount and reset power
If the unit is still chirping, unmount the unit. Then use your circuit breaker to turn off AC power. Wait at least 15 seconds before turning power back on and remount the device.
1 Beep Every Minute: Low Battery. It is time to replace the batteries in your carbon monoxide detector. 5 Beeps Every Minute: End of Life. This type of chirp indicates it is time to replace your carbon monoxide alarm.
The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.” If you breathe in a lot of CO, it can make you pass out or kill you.
False or nuisance alarms are when your smoke detector or CO alarm goes off, but there is no presence of smoke or carbon monoxide in your home. However, if your smoke or carbon monoxide detector sounds indicating an emergency and you are not certain it is a nuisance alarm, evacuate the home and call 9-1-1.
This may silence the alarm for a brief period, but it will reactivate if CO levels remain high.
If you experience symptoms that you think could be from CO poisoning: DO GET FRESH AIR IMMEDIATELY. Open doors and windows, turn off combustion appliances and leave the house.
Replace the batteries to silence the “low battery” beep, or press and hold the test/silence button to turn off the high-CO warning alarm. During an alarm, evacuate immediately and call emergency services. Make sure everyone is accounted for and check for CO poisoning symptoms.