Dishwasher displays E2 and will not start or stops shortly after starting; may attempt to drain repeatedly.

Safety first: Disconnect power at the breaker and ensure the dishwasher is cool before servicing. Turn off water if you will move the unit.

Step-by-step checks:

• Clean filters and sump: Open the door, remove the lower rack, and take out the coarse and fine filters. Rinse under warm water and remove food debris from the sump area.
• Inspect drain hose: Follow the drain hose from the dishwasher to the garbage disposal or sink drain. Check for kinks, crushing, or clogs. Detach the hose (place a towel or pan underneath) and flush it with water.
• Check air gap (if installed): Remove the air gap cap on the sink and clear any debris or buildup.
• Garbage disposal knockout: If the dishwasher is newly installed to a disposal, confirm the disposal's dishwasher knockout plug has been removed.
• Test drain pump: Restore power and run a cancel/drain cycle. If you hear the pump humming but little water exits, the drain pump may be jammed or weak and require replacement.

Warning: Never run the dishwasher with standing water that will not drain; this can cause leaks and further damage.