Maintenance Guides / Fireplace & Chimney

Test fireplace damper

Difficulty: easyTime: 10 mins

Why it matters

A stuck or closed damper traps smoke inside your home and allows carbon monoxide to build up. Rust commonly seizes dampers after summer dormancy.

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How to do it

  • 1

    Stand in front of your fireplace and look up to locate the damper handle.

  • 2

    Gently pull or turn the damper control to the fully open position.

  • 3

    Listen and feel for smooth movement without grinding or sticking.

  • 4

    Close the damper slowly and verify it seats completely with no gaps.

  • 5

    Shine a flashlight up the chimney flue to confirm no light leaks around the damper.

  • 6

    If the damper sticks, contact a chimney sweep for professional service.