When this route may help
Start with the symptoms you can safely observe.
Some boiler problems need prompt professional attention, but an online enquiry is not a gas-emergency service. Use the safety guidance first, then send details if it is safe to remain at the property.
If you smell gas, suspect carbon monoxide or a carbon monoxide alarm sounds, do not use this form as your first response. Leave the property, avoid flames and electrical switches, and call the National Gas Emergency Service on 0800 111 999 from outside.