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Once a minute, the alarm sounds 3 quick “chirps”,
and the green light flashes quickly three times.

Unit malfunction. Unit needs to be replaced. Based
on self-diagnostic tests, the unit has detected a fault
or the Alarm has reached its end-of-life, 5 years.

Units under warranty should be returned to 
manufacturer for replacement. See “Limited
Warranty” for details.

The horn “chirps” once a minute.

Low battery warning. Battery is low or missing.

Replace the battery. Avoid interrupting AC power.

If your Alarm does this...

It means...

You should...

Green light is OFF. Unit will not alarm when you press
the Test/Silence button.

Unit may not be receiving any power.

Check the AC power supply. Make sure a fresh 9V
battery is installed to power the battery back-up*.

Green light flashes ON, once a minute (horn is silent).

Alarm is not receiving AC power. Unit is operating on
battery back-up.

Check the AC power supply.

TROUBLESHOOTING GUIDE

Alarm goes back into alarm after you pressed the
Test/Silence button to silence an alarm.

Gas and/or CO levels are still potentially dangerous.

Refer to “If Your Gas/CO Alarm Sounds” for details 
on how to respond to an alarm. If anyone is feeling ill,
EVACUATE your home immediately and call 911.

If you have any questions that cannot be answered by reading this manual, call Consumer Affairs: 1-800-323-9005.

*For a list of acceptable replacement batteries, see “Regular Maintenance.”

The horn sounds constantly with no pattern and 
cannot be silenced.

Unit malfunction. Unit needs to be replaced.

Units under warranty should be returned to 
manufacturer for replacement. See “Limited
Warranty” for details.

Alarm sounds frequently even though no high levels
of gas or CO are revealed in an investigation.

The Alarm may be improperly located. Refer to
“Where to Install This Alarm.”

Relocate your alarm. If frequent alarms continue, have
home rechecked for potential problems. You may be
experiencing an intermittent gas or CO problem.

LIMITED WARRANTY

BRK Brands, Inc., ("BRK") the maker of BRK Electronics

®

brand products warrants that for a period of five years from the date of purchase, this product will be free

from defects in material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the 
warranty period. Replacement will be made with a new or remanufactured product or component. If the product is no longer available, replacement may be made 
with a similar product of equal or greater value. This is your exclusive warranty.

This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is
required to obtain warranty performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change
the terms and conditions of this warranty.

This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper voltage or
current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further, the warranty
does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.

BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by 
applicable law, any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states,
provinces or jurisdictions do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the
above limitations or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or
province to province.

How to Obtain Warranty Service

Service: 

If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Consumer Affairs Division at 1-800-323-9005,

7:30 AM - 5:00 PM Central Standard Time, Monday through Friday. To assist us in serving you, please have the model number and date of purchase available when 
calling. 303 Nelson Avenue, Neosho, MO 64850-8806.

Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect 
to battery.

For your records, please record:

Date Purchased: _______________________________

Where Purchased: ____________________________________________

Date Installed: ____________/____________Month/Year

Replacement date is five years after installation:__________/__________

Month/Year

NOTE: End of Life Signal — Once the unit reaches the end of its 
lifecycle, the malfunction signal will sound once a minute to indicate
the need to immediately replace the Alarm.

Printed in Mexico   M08-0123-000   Q   05/05

BRK Electronics

®

is a registered trademark of BRK Brands, Inc.

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Summary of Contents for GCO1

Page 1: ... of either gas detected Therefore it is possible that you may smell gas before the Alarm is activated If you are not sure which gas your home uses contact your utility company For CO Alarms the National Fire Protection Association NFPA recommends that a CO Alarm should be centrally located outside of each separate sleeping area in the immediate vicinity of the bedrooms For added protection install...

Page 2: ...ng excessively noisy power Examples of noisy power could be major appliances on the same circuit power from a generator or solar power light dimmer on the same circuit or mounted near fluorescent lighting Excessively noisy power may cause damage to your Alarm Find the pair of self adhesive labels included with this Gas CO Alarm On each label write in the phone number of your emergency responder li...

Page 3: ...______________________________ 3 Immediately move to fresh air outdoors or by an open door or window Do a head count to check that all persons are accounted for Do not re enter the premises or move away from the open door or window until the emergency services responder has arrived the premises have been aired out and your CO Alarm remains in its normal condition 4 After following steps 1 3 if you...

Page 4: ...ndicate relative CO exposure level Silent All segments of display are turned on for a short time upon initial power Then the battery level icon is displayed 4 SILENCING THE LOW BATTERY WARNING This Silence Feature can temporarily quiet the low battery warning chirp for up to 8 hours if AC power is present You can silence the low battery warning chirp two ways 1 Manually Press the Test Silence butt...

Page 5: ...re often sources of CO If they are not properly main tained are improperly ventilated or malfunction CO levels can rise quickly CO is a real danger now that homes are more energy efficient Air tight homes with added insulation sealed windows and other weatherproofing can trap CO inside SYMPTOMS OF CO POISONING These symptoms are related to CO POISONING and should be discussed with ALL household me...

Page 6: ...ustion engines abnormal operation of fuel fired appliances and fireplaces CO Alarms are intended to alarm at carbon monoxide levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide exposure This CO Alarm monitors the air at the Alarm and is designed to alarm before CO levels become life threatening This allows you precious time to leave the house and correc...

Page 7: ...s is your exclusive warranty This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable Keep the original sales receipt Proof of purchase is required to obtain warranty performance BRK dealers service centers or retail stores selling BRK products do not have the right to alter modify or any way change the terms and conditions of this w...

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