ISSUE GUIDE

Carbon monoxide detector alarming inside a home

Carbon Monoxide Alarm Going Off

A carbon monoxide alarm sounding indicates potentially deadly gas buildup from fuel-burning appliances. Immediate evacuation and professional inspection are critical for occupant safety.

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Carbon monoxide exposure can be fatal within minutes.

RECOMMENDED PRO

HVAC TECHNICIAN

WHAT THIS USUALLY MEANS

Common sources include malfunctioning furnaces, blocked exhaust flues, gas appliance failures, or inadequate ventilation.

DIY-SAFE CHECKS

Do not attempt to locate the source. Evacuate the home immediately.

HOW TO FIX

  • Move all occupants outdoors to fresh air
  • Call emergency services if symptoms occur
  • Do not re-enter until cleared by professionals

DIY investigation is unsafe and not permitted.

WHEN TO CALL A PRO

Always treat a carbon monoxide alarm as an emergency and contact licensed HVAC or emergency services.

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