How to troubleshoot wall clocks.
How to fix a wall clock that runs slow.
Use the fingers of your dominant hand to gently turn the regulation screw.
This screw regulates the speed of the clock.
The bob will settle lower making the effective length of the pendulum longer.
Each turn of the screw slows the clock by two minutes per 24 hour period.
Turning the screw to the left will lower the pendulum slightly and slow down the clock.
Again you should also check the electric clocks handles.
How to repair an old wall clock if your wall clock is off you will definitely replace the new battery if it remains dead.
Wind the clock if it has stopped running.
To slow down the clock loosen the adjustment nut turn it toward your left.
If they are getting a collision or there is unnecessary friction among them smoothen out the edges of the handles with a piece of cloth.
Open the door and bring the pendulum all the way to the side then let.
To speed up the clock tighten the nut turn it toward your right.
Do you see any damage to the wires.
If not there may be internal damage.
If so replace the cables with new ones and see if it works or not.
It is possible to install the battery upside down where the battery is.
Gently take off the compartment and take a look at the connections.
The clock will run slower.
You should hear a ticking sound.