The fireplace can look ready from the living room while the flue
above it has not been checked in years. Soot, blockage, damaged liners,
and water entry are not things to judge by looking into the firebox with
a flashlight. I ask when a chimney professional last inspected it and
what they found.
Keep the hearth and appliance area clear and follow the fireplace or
stove instructions for fuel and operation. Before use, have a qualified
chimney professional inspect and clean the system as needed. The
U.S. Fire Administration recommends annual professional inspection and
cleaning for fireplaces and wood stoves. A gas fireplace has its own
burner, venting, and service requirements; a clean-looking glass front
does not establish safe operation.
If there is smoke entering the room, a strong odor, signs of water at
the chimney, cracked masonry, or an animal in the flue, stop using it
and arrange evaluation. Don’t use a chimney-cleaning log as a substitute
for an inspection. On the exterior, a damaged cap, flashing, or mortar
needs the right trade and safe roof access.
Keep the inspection report and any repair proposal. It helps you
distinguish routine cleaning from a documented defect. My Helpful
Resources page has contractor contacts; the Homeowner
Tools & Supplies guide includes fire-safety basics, but chimney
service is a professional job.