A grandfather clock is more than a timekeeper—it's a legacy piece. But when the pendulum stops swinging, the charm quickly fades into frustration. Understanding why your grandfather clock pendulum stops is the first step toward restoring its accuracy and elegance.

Let’s walk through the most common causes and expert-recommended solutions.

1. Clock Is Not Properly Leveled

Leveling is essential for consistent pendulum motion. If the clock is tilted, the pendulum may lose momentum or stop mid-swing.

Solution:
Place a carpenter’s level on top of the clock and adjust the front or rear feet accordingly. Check both side-to-side and front-to-back alignment.

2. Obstruction in the Pendulum’s Path

Internal components like the chime rods or even a misaligned case panel can interfere with the pendulum’s arc.

Solution:
Inspect the pendulum chamber carefully. Ensure it swings freely without brushing against any objects. Remove dust or debris if needed.

3. Suspension Spring Issues

The suspension spring is the thin metal strip from which the pendulum hangs. It plays a critical role in maintaining the pendulum's movement.

Solution:
Check if the spring is bent, cracked, or overly stiff. Replace it with a model-specific spring if it's compromised.

4. Incorrect Pendulum Setup

If the pendulum is hung too low or attached incorrectly to the pendulum leader, it will fail to maintain its motion.

Solution:
Verify that the pendulum is properly hooked onto the leader. Adjust the bob height only as recommended by the manufacturer.

5. Dirty or Unserviced Movement

Years of operation without professional maintenance can cause buildup in the escapement or gear train, leading to stoppage.

Solution:
Schedule a complete cleaning and oiling with a certified horologist. Avoid using household lubricants or attempting DIY cleaning.

6. Power Loss from Weights or Springs

If weights aren't descending smoothly or the clock is underpowered, the pendulum will naturally come to a halt.

Solution:
Ensure all weights are evenly loaded and descending freely. Check chains or cables for tangling or resistance.

Is Your Grandfather Clock Worth Repairing?

In most cases, yes. A stopped pendulum is typically a sign of minor misalignment or overdue maintenance—not a failed mechanism. Whether it's a modern Tempus Fugit or an 18th-century heirloom, grandfather clocks are designed to be serviced and restored.

Final Thoughts

When your grandfather clock pendulum stops, don’t assume the worst. Begin with simple checks—leveling, obstruction, or pendulum alignment. If those don’t solve the issue, seek professional help before the problem worsens. With proper care, your clock will continue marking time and history for years to come.