Chimney warning sign
Suspected Chimney Blockage
Recognize why a restriction may be urgent and what a professional needs to evaluate before reuse.

Not a diagnosis
Possible areas to investigate
More than one condition can produce the same symptom. A qualified professional may consider:
- Nest or animal material
- Fallen masonry or liner pieces
- Heavy deposits
- Debris or damaged cap
- Collapsed or disconnected vent component
Build a useful record
What to document safely
- Smoke or draft change
- Falling debris
- Animal activity
- Recent weather or construction
- Alarm activation
Practical response
Sensible next steps
- Keep the appliance off
- Move to fresh air if alarms or symptoms occur
- Do not probe from below
- Arrange inspection and safe removal
Relevant professional scope
Animal Nest and Chimney Blockage Removal
Plan safe, lawful removal and determine how the obstruction entered before installing a prevention measure.