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Safety and emergency readiness

Test every carbon-monoxide alarm

Carbon monoxide cannot be seen or smelled, so a working alarm is an essential warning layer.

Homeowner guidance with clear stop points

When it usually needs attention

Usually repeats every 1 month

CPSC calls for monthly CO-alarm testing.

When this guide applies

Applies when fuel-burning equipment, an attached garage, or a portable generator creates CO risk.

What to do

Map and test each alarm with its built-in Test button, then record the result by location.

Applies when: Applies when fuel-burning equipment, an attached garage, or a portable generator creates CO risk.

Who should handle it: The user test is resident care; required placement and hardwired repair depend on the owner, manager, and local rules.

Tools

  • Stable step stool only if safe access requires it

Parts and supplies

  • Exact replacement battery only if the device instructions call for one

Safety gear

  • No special PPE; warn the household about the planned sound

Before you start

  • Know the difference between Test mode and a danger alarm

Power, water, or fuel shutoffs

  • None for the built-in user test

Cleaner or chemical limits

No cleaner or test gas is used.

Stop and get help when

  • An unplanned CO danger indication is an evacuation event, not a maintenance task
  • Do not open hardwired connections

Who to call: Use emergency services for a danger alarm and qualified service for hardwired faults.

Reviewed sources