---
title: Understanding Carbon Monoxide (CO) Detectors
description: Understanding the importance of Carbon Monoxide (CO) Detectors.
---

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# Understanding Carbon Monoxide (CO) Detectors

## Understanding the importance of Carbon Monoxide (CO) Detectors.

**What Is Carbon Monoxide?**

Carbon Monoxide (CO) is created when fuels like gas, wood, or charcoal are burned. It can build up indoors if not ventilated and is **invisible and odorless,** making it extremely dangerous.

 

**Common Sources**:

- Gas stoves, furnaces, water heaters
- Wood-burning fireplaces
- Idling vehicles in garages

 

**Where Are CO Detectors Installed?**

CO detectors are typically installed:

- In hallways near sleeping areas
- Near gas-burning appliances
- On every level of your home

 

Most units are hardwired and include a 9-volt battery backup.

 

**Warranty Expectations**

**What Is Covered:** Hardwired CO detectors with battery backup are warranted to function as installed.

**What to Expect**: If the CO detector fails during the coverage period due to a manufacturer defect or installation issue, we will replace the unit. \[[Understanding Your Circuit Breakers](https://support.vanmetrehomes.com/understanding-your-circuit-breakers?hsLang=en)\] 

**How You Can Help:** Your home’s CO detectors only work effectively with proper care. Here's how you can maintain safety and compliance. Test detectors monthly. Change the backup battery twice a year. Keep the unit clean and dust-free.

**How to Test Your CO Detector (Monthly)**

1. Press the test button on the detector’s front.
2. Listen for a loud, continuous alarm.
3. If it chirps once or doesn’t sound, replace the battery immediately.

 

**How to Keep Your Detector Clean**

Dust can interfere with performance or cause false alarms.

**Clean every 6 months:**

- Remove the detector cover
- Gently vacuum with a soft brush
- Optionally, use compressed air to remove debris

 

**Battery Backup Information**

Even though detectors are hardwired, the backup battery is critical during power outages.

**Replace the 9-volt battery:**

- Twice a year (Daylight Saving Time is a great reminder)
- Immediately if the unit chirps (low battery signal)

 

**How to Replace the CO Detector Battery**

1. Disconnect the wiring harness on the back.
2. Remove the old battery.
3. Press the test button to discharge any residual power.
4. Insert a new 9-volt battery.
5. Reconnect the wiring harness.
6. Press the test button again to confirm it's working.

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