Test Carbon Monoxide Detectors
Why It Matters
Carbon monoxide is the leading cause of poisoning deaths in the US. Your detector is your only warning.
Quick Guide
- 1
Gather your tools and materials
You'll need: basic tools. Materials required: necessary materials.
- 2
Perform the test carbon monoxide detectors
Press the test button on all CO detectors and verify they alert properly. Replace units older than 7 years. Safety note: CO is an invisible, odorless killer - take detector maintenance seriously.
- 3
Verify and clean up
Check that the work was completed correctly and clean up your workspace.
Community Tips
Press the test button on each detector for 3-5 seconds until the alarm sounds; if nothing happens, replace batteries immediately even if they appear fresh, as low voltage often silences the alarm before the battery indicator depletes. First Alert Onelink Safe & Sound ($100-130) combines CO detection with smoke and heat sensing, simplifying multi-detector testing into a single monthly routine.
Carbon monoxide detectors expire after 5-7 years regardless of functionality, so mark the manufacture date on each unit with a permanent marker and replace them entirely rather than relying on new batteries to restore failed sensors. Kidde Nighthawk ($40-60) displays the date of manufacture on the back, making it easy to track replacement schedules across your home.
Testing all detectors takes 10 minutes monthly but prevents the $200-400 service call costs that result from false alarms or missed replacements that leave gaps in coverage. Nest Protect ($120-140) sends smartphone notifications confirming test completion, helping households maintain accountability across multiple detectors without manual tracking sheets. ---