Dishwasher shows F4E3; water fills but spray arms do not move; dishes remain dirty; you may hear a low hum.

Safety First: Turn off power and water supply before accessing the pump.

• Check for obvious blockages: Remove the lower rack and spray arm. Take out the filter assembly and inspect the sump for broken glass, bones, or debris blocking the impeller.
• Clean filters: Rinse the fine and coarse filters under running water and reinstall correctly.
• Listen to the motor: Restore power briefly and start a cycle. If you hear only a faint hum and no strong water spray, the circulation pump may be seized or failed.
• Access circulation pump: Remove the dishwasher from under the counter if needed. From the bottom, locate the circulation pump/motor assembly attached to the sump. Check for leaks or burn marks.
• Replace pump: If the impeller is free of debris but the motor will not run or is noisy, replace the circulation pump assembly with the correct Whirlpool part.