Suspect CO?

If the presence of CO is indicated by an alarm or any of the danger signs listed here, then take action immediately:

  • Evacuate the affected area, moving yourself and others into fresh air.
  • Seek medical assistance if required: Go to your GP or call 111 for the NHS non-emergency contact line, which is available 24 hours a day, 365 days a year. If the situation is urgent and numerous people have been affected, call 999 for an ambulance and the fire brigade.
  • Ventilate the affected area by opening all doors and windows.
  • If possible, shut off the gas supply or appliances: call Gas Emergency Service (24 hours) on 0800 111 999.
    For Solid Fuel Advice Line: 0845 601 4406
    For Oil (OFTEC): 0845 658 5080
  • If the structure is a rental property, contact the landlord.

Before going back into the property, do the following:

  • Consult a Gas Safe Registered Engineer or an appropriate fuel source engineer to identify the source of CO and make the necessary repairs.
  • Place a CO alarm in the house.
  • Have a qualified engineer using an FGA safety-check all appliances before using them again.

CO and Gas Detection Helpline: 0800 1694 457 

Note: CO can penetrate walls, so if your appliances have been checked but the alarm still sounds, check the neighbouring properties or central heating sources.