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CHAPTER 7:
Troubleshooting Guide
Problem...
This means...
You should...
The BATTERY Light turns
YELLOW. It flashes and the
horn “chirps” twice a minute.
Low battery warning.
Install a new 9V alkaline or lithium battery*.
During testing, when you
press and hold the Test/
Silence button, the BATTERY
Light turns YELLOW.
Low battery
Install a new 9V alkaline or lithium battery*.
Horn chirps and yellow
service light blinks three
times every 30 seconds.
Unit needs to be
replaced.
Units under warranty should be returned to
manufacturer for replacement. See “Limited
Warranty” for details.
CO Alarm goes back into
alarm 4 minutes after you
press the Test/Silence
button.
CO levels indicate a
potentially dangerous
situation.
IF YOU ARE FEELING SYMPTOMS OF CO
POISONING, EVACUATE your home and call
911 or the Fire Department. If not, press the
Test/Silence button again and keep
ventilating your home
.
CO Alarm alarms frequently
even though no high levels of
CO are revealed in an
investigation.
The CO Alarm may be
improperly located.
Refer to “Where to Install
Your CO Alarm.”
Relocate your alarm. If frequent alarms
continue, have home rechecked for potential
CO problems. You may be experiencing an
intermittent CO problem.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call our Consumer Affairs
Department at 1-800-323-9005, 7:30 a.m. - 5:00 p.m. (CT).
