How to Test a Carbon Monoxide Detector
Quick Answer
Press the test button to trigger the alarm; replace batteries if it fails, and check the expiry date (usually 5-7 years).
How to troubleshoot How to Test a Carbon Monoxide Detector
Carbon monoxide is a silent killer. This guide explains how to test your CO detector and interpret its warning signals to keep your family safe.
Step-by-Step Fix
- Press and hold the test button on the front of the CO detector for 5 seconds.
- If the alarm sounds loudly, the unit is working; if not, replace the batteries.
- Replace the batteries with new ones and test again.
- Check the manufacture date on the back of the unit – if over 7 years, replace the entire detector.
- Install the detector at head height in a central location, following manufacturer guidelines.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| End-of-life chirp | Unit expired | Replace the entire CO detector immediately. |
| False alarm | High humidity or dust | Clean the unit and ensure it is not near steam or aerosol sprays. |
Frequently Asked Questions
How many CO detectors do I need?
At least one on every floor and outside sleeping areas.
Can a CO detector detect smoke?
No, CO detectors only detect carbon monoxide; you also need separate smoke alarms.