How to Reset a First Alert Carbon Monoxide Detector

eHow may earn compensation through affiliate links in this story. Learn more about our affiliate and product review process here.

A Carbon Monoxide (CO) detector is a home device that can save your life, as it detects CO gas. CO gas is colorless, tasteless and odorless, and a detector is needed to test ppm (parts per million) and alert you to unsafe levels. Resetting your First Alert Carbon Monoxide detector may be necessary after it detects CO levels and the situation has been resolved.

Advertisement

Step 1

Look at your detector. You will see two buttons if your detector has an LCD display. One is labeled "peak level," the other "test." If your detector is ceiling-mounted, it will only have one button.

Video of the Day

Step 2

Press "peak level" and "test" at the same time if your detector is the LCD display type, and keep these buttons held down until it beeps and the LCD shows "000." It is now reset.

Step 3

Press and hold the button labeled "test/reset" for 5 seconds if your detector is ceiling-mounted.

Warning

If your CO detector is going off, do not assume it is malfunctioning, go outside or open your windows, and call the fire department.

Advertisement

Report an Issue

screenshot of the current page

Screenshot loading...