Replace CO detector units
Short answer
Check the manufacture date on the back of each CO detector; replace any unit older than 5 years.
Why It Matters
CO sensors degrade after ~5-7 years even if the unit still powers on. An expired detector may miss dangerous levels.
Tools
- Step stool (if mounted high)
Materials
- Replacement CO detector units
How to Do It
- Locate each CO detector in your home.
- Remove the unit from its mounting bracket or wall base and flip it over to find the manufacture date label on the back.
- If the manufacture date is more than 5 years ago, or beyond the manufacturer's stated lifespan, set the unit aside for replacement.
- Install a new CO detector in the same location, following the mounting instructions included with the unit.
- Test the new unit using its test button to confirm it powers on and sounds an alert.
Related Tasks
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