If the dryer motor runs but the drum doesn't turn, a broken dryer drive belt, weak drive motor or binding drum seals could be the problem.
First, unplug the laundry center and check the dryer drive belt. Replace the drive belt if it's worn or broken.
If the belt is okay, spin the dryer drum manually to check for binding. If damaged drum seals prevent the drum from spinning, replace the drum seals.
If the drum spins okay and the drive belt is good, then you may need to replace the drive motor because it's too weak to spin the drum.