DIAGNOSIS E1 is a water supply error. E3 is a drain error. The dishwasher isn't getting enough water or can't drain it in time.
FIX For E1: Ensure the water supply valve under the sink is fully open. Check the inlet hose for kinks. For E3: Clean the filter assembly thoroughly. Check the drain hose for clogs or a missing high loop.
IF THAT DIDN'T WORK For E1, the water inlet valve screen may be clogged with sediment. The valve is behind the lower kick plate. For E3, the drain pump may be obstructed or failing.
HEADS UP These errors will stop the cycle. You must clear the error by holding the 'Power' or 'Cancel/Drain' button for 3 seconds before restarting.