It may take up to two weeks to properly set a clock that runs fast.
How to fix a wall clock that runs fast.
You should hear a ticking sound.
Step 9 mark each spot for reference and repeat this process until the cuckoo clock is keeping accurate time.
Swing the pendulum on the inside of the clock if it has a pendulum.
Open the door and bring the pendulum all the way to the side then let.
Fixing a clock that runs too fast can be as easy as turning a screw.
To speed up the clock tighten the nut turn it toward your right.
If the cuckoo is still running fast but not as much move the pendulum leaf down a little more.
To slow down the clock loosen the adjustment nut turn it toward your left.
If not there may be internal damage.
A clock that runs quickly still works fine.
How to troubleshoot wall clocks.
Wind the clock if it has stopped running.
It is possible to install the battery upside down where the battery is.
It just needs a simple adjustment.
The bob will settle lower making the effective length of the pendulum longer.
The clock will run slower.