Is it a carbon monoxide detector false alarm when my CO alarm sounds when there doesn't seem to be a problem?

Carbon Monoxide detectors false alarms should not occur if your alarm is in working order. Remember, CO is an odourless, colourless gas. If your carbon monoxide alarm went off, it detected potentially harmful amounts of CO. After the professionals have evaluated the situation, make sure no one has any symptoms of CO poisoning. Here are a few situations that may cause a carbon monoxide detector "false alarms:"

  • The CO alarm needs to be relocated. Carbon monoxide alarms should be located 15-20 feet away from all fossil fuel burning sources like furnaces and stoves. Alarms should be located 10 feet away from sources of humidity like showers.
  • Fossil fuel burning appliances may not be burning fuel completely. Check pilot lights/flames for blue colour. Appearance of yellow or orange flames indicates incomplete combustion-a source of carbon monoxide.
  • The type and age of the CO alarm may cause a false alarm. If your carbon monoxide detector is one with a Sensor Pack Module, the SensorPack Module should be replaced after 2 years of use.