What to Do If Your Carbon Monoxide Detector Alarms
A carbon monoxide alarm is a life-saving device that warns you of dangerous CO levels from malfunctioning gas appliances including your furnace, boiler, or water heater. CO is colourless and odourless, making it impossible to detect without an alarm. This guide covers the immediate actions to take and how to ensure your gas appliances are safe afterward.
Immediate Steps to Take
1. EVACUATE IMMEDIATELY — get everyone out of the building, including pets. Do not spend time investigating. 2. Call 911 from outside. Tell the operator your CO detector has alarmed and you have evacuated. 3. Do not re-enter until emergency services has cleared the building and confirmed CO levels are safe. 4. Symptoms of CO exposure include headache, dizziness, nausea, shortness of breath, and confusion. If anyone has these symptoms, tell emergency services immediately.
Next Steps
5. After the building is cleared, have a licensed gas fitter inspect all gas appliances — furnace, boiler, water heater, gas fireplace — to identify which appliance caused the CO and repair it. 6. Ensure you have working CO detectors on every floor of your home and outside each sleeping area. Test detectors monthly and replace batteries annually. 7. Do not restart any gas appliances until they have been professionally inspected and cleared.
When to Call CANRO
If the steps above do not resolve your issue or if you encounter any gas odour, carbon monoxide alarm, electrical hazard, or visible damage, contact CANRO Heating & Cooling immediately. Our licensed technicians are available for prompt service across Greater Vancouver. Emergency service is available for urgent situations. Call (604) 359-1081 for fast, professional help.
Why Professional Service Matters
Attempting HVAC repairs without proper training and licensing can be dangerous — especially with gas-fired equipment. Licensed gas fitters have the training, diagnostic equipment, and parts to safely diagnose and repair your system. CANRO Heating & Cooling technicians are Red Seal certified, fully licensed, and insured for your protection.
Safety Reminder
If you smell gas, suspect carbon monoxide or believe there is an immediate danger, leave the property and contact emergency services or the appropriate gas emergency authority. Do not remain inside — exit the building immediately and call for help from outside.