1. Open the doors and windows.
2. Switch off all fuel-burning appliances. 
3. Evacuate the building.
4. Once outside, call for help if you suspect CO poisoning.
5. Call your gas or other fuel supplier.
6. Don't go back inside if the alarm is still ringing.
7. Don't use your fuel-burning appliances until a technician has checked that they're working properly.

Updated May 31, 2023 07:45