On automatic cycles, the main thing that will make the dryer finish too early is usually a temperature sensor, not the moisture bars. The moisture bars extend the cycle, but don't shorten it. If you have a thermistor or thermostat go wonky, the dryer will act like it's empty and end auto cycles fast. Like others already said, check connections and wires! LG puts the same connectors in everything electronic. Doesn't matter whether it's an $8 Bluetooth speaker or a $1500 washer, they use the same $.0003 parts. Beware of loose and corroded connectors!