How to Check Fire Detectors

Fire detectors come in a variety of designs, each with its own benefits and drawbacks. The optical detector is most common type, and requires monthly testing. These work best for smoldering-type fires that start after a lot of smoke is produced. Ionization-type smoke detectors are much more sensitive to very small amounts of smoke, but tend to give false alarms. Heat detectors warn of sudden rises in temperature, and are used to detect flames. Since they do not trigger in smoke, they are ideal for kitchens or smoking rooms. Identify each alarm type in your home and read all usage instructions for proper maintenance.

Matches
Batteries (if required)
Hair dryer (for heat detector only)

Instructions

- 1
  Read all instructions printed on the device. Some detectors keep their instructions inside the battery compartment. If none are present, try searching the model number online for detailed instructions.
- 2
  Press and hold the "Test" button until the alarm sounds. Release the button. If no alarm sounds after 15 seconds, replace the battery.
- 3
  Strike a match and immediately blow it out to check smoke detectors. Hold the smoking match approximately 2 inches below the detector until the alarm sounds. If no alarm sounds after 15 seconds, the detector needs cleaning or replacement.
- 4
  Turn on a hair dryer to its maximum heat setting and hold it 4 inches from a heat detector. Aim it at the heat detection sensor, usually located in the center of the device. Once the alarm sounds, turn off the dryer. If no alarm sounds after a minute, then the device may need maintenance or replacement.

Are Smoke Detectors the Same as CO Detectors?

How to Troubleshoot a Fire & Smoke Alarm

Smoke Detectors