A broken drive belt will stop the dryer drum from spinning. It is the most common reason a gas dryer is no longer tumbling. The belt wraps around the drum, and as the belt rotates, it causes the drum to spin. The machine may work when the drive belt breaks, but the drum does not tumble.
Wrinkle prevention is enabled, you are turning on delayed start by accident, the on/off switch is faulty, the control panel has failed, the internal computer is faulty or has a glitch, or the motor has loose wiring or needs to be repaired or replaced.
If you need to reset your LG Dryer and need to reset your LG Dryer Control Panel, Power Off the Dryer. Then unplug the dryer from the electrical power outlet. Press down and then hold on Start/Pause for five seconds during the period when there is no power going to the dryer.