Why didn't the fire department, gas company or emergency responder locate the source of CO after my alarm sounded?

If your carbon monoxide alarm went off, it detected a dangerous level of CO. Some reasons why a responder may not find CO during an investigation:

  • CO levels dissipated in fresh air. If windows and doors were opened before the first responder arrived, the same concentration of CO gas may no longer be present. Be safe first and vent dangerous carbon monoxide gas to the outside. The responder can try to recreate the conditions. If your CO alarm is a model containing a digital display, there is a "peak level" button which will display the highest level of CO detected by the alarm since the alarm was reset.
  • The alarm may have been caused by an on-again, off-again problem. CO alarms measure gas exposure over time, so the exact conditions that caused an alarm may be difficult to duplicate during a CO investigation.

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