Symptom field note
Suspected chimney blockage
A vent seems obstructed, smoke reverses direction or debris falls into the appliance.
If a carbon monoxide alarm sounds or smoke enters living space, leave the building and call emergency services from outside.
What might be behind it?
Several conditions can produce similar symptoms. These are possibilities for a professional to investigate, not a remote diagnosis.
Nesting, fallen masonry, deposits, a damaged liner or a blocked termination are possible causes.
A blocked flue can affect other connected fuel-burning equipment.
What to document before calling
- Which appliances share the chimney
- The first sign and any recent storm or work
- Photos of fallen debris without reaching into the vent
Take photographs only from a safe position. Avoid roof access, opening a vent or continuing to operate a suspect appliance to reproduce the problem.
Practical next step
Stop using connected appliances as advised by emergency personnel or a qualified professional and arrange an inspection that confirms the full vent path.
Describe the symptom first, then ask the company which inspection or service they recommend and why. Request written findings before approving major repair work.
Questions for the company
- Do you work on my fuel and appliance type?
- Which possible causes will your assessment check?
- What areas are inaccessible and how will you document them?
- Will the report include photos, limitations and a separate repair scope?