I have a centurion wall clock it works but after a few hours the pendelum will stop moving and the time will stop what causes this to do this?

Hi Sissykay. My clock did the same thing and I had a guy come in and see what he thought was wrong and he said it just needed a good cleaning inside. It's been fine every since then. There's always somebody out there who can put their hands to anything and fix it. Good luck.