Home Maintenance Guide

How Long Do Carbon Monoxide Detectors Last?

Carbon monoxide detectors have a limited service life that varies by model. Check the manufacture date, replacement date, end-of-life signal, and manual for every unit, then replace it by the manufacturer’s deadline or immediately if it fails a monthly test.

Test Sump Pump
Correct Home Care Helper

Test Sump Pump

Test the sump pump to confirm it starts, drains properly, and the discharge area is clear.

Difficulty: EasyTypical cost: $0–$20Suggested frequency: Every 6 monthsPriority: High

Where is the expiration date?

Look on the rear or side label and in the manual. Some units show a manufacture date and specify a service-life calculation.

What do different beeps mean?

Alarm patterns can distinguish detected CO, low battery, malfunction, and end of life. Treat an active CO alarm as an emergency and follow its instructions.

Where should detectors be installed?

Follow manufacturer instructions and local requirements, including guidance for sleeping areas, levels of the home, fuel-burning equipment, and attached garages.

Are combination alarms appropriate?

Listed combination smoke/CO alarms can be appropriate when their placement satisfies the requirements for both functions.

Make It Easy to Remember

Turn this advice into a simple home-care routine.

Correct Home Care can email you when it is time and keep the important details handy when you need them.

General guidance reviewed against U.S. Consumer Product Safety Commission. Follow product instructions, local requirements, and qualified professional advice for your home.