GeneralEmergency2026-02-28
How to Test Your Carbon Monoxide Alarm
Testing CO alarms monthly is simple and could save your life.
Carbon monoxide is invisible and odourless — working alarms are essential.
Test monthly
Press the test button until it sounds; if it's weak or silent, replace the batteries or the unit.
Replace on schedule
CO alarms expire — replace them by the date printed on the unit, and place one on every level and near bedrooms.
Key takeaways
- Test monthly with the button
- Replace by the printed date
- One per level and near bedrooms
- Service fuel appliances yearly
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