LG Dishwasher not working. Shuts off after 15 minutes. 60/Loop 303. CONCERN: Customer reports dishwasher is not draining properly. CAUSE: Tested voltage to drain pump and found proper operating voltage to Dishwasher drain pump, dishwasher drain pump impeller still not working. Dishwasher drain pump failed. CORRECTION: Replaced dishwasher drain pump and tested, operation now normal.