Kenmore Dishwasher Smells Bad - Causes & Fix

Kenmore Dishwasher Smells Bad — What’s Happening

A bad smell from your Kenmore dishwasher is not a fault code or electronic error. It is a symptom, almost always caused by food debris, standing water, or buildup somewhere in the wash system. The most common odor is a rotten or dirty-water smell from food particles trapped in the filter, sump, spray arms, or door seals.

In some cases you may notice a burning-plastic or metallic smell. This usually means a plastic item has shifted too close to the heating element, or residue has baked onto the heater. Either type of odor points to a physical cleaning or inspection task rather than a control-board or sensor fault.

Jump to Fix

Most Likely Causes

• Dirty filter or trapped food debris in the sump area This is the most common cause and produces a rotten or dirty-water smell when food particles collect on the filter, screen, or sump floor.
• Clogged drain path or standing dirty water A blocked drain pump, kinked drain hose, or clogged air gap leaves stagnant water in the tub that smells like sewage or food.
• Food particles and soap scum buildup in spray arms and seals Hidden residue on spray-arm ports, the door gasket, and tub edges grows bacteria and creates a musty or sour odor over time.
• Improper drain-hose routing or backflow from the sink If the drain hose is not looped high or connected correctly, wastewater from the garbage disposal or sink can flow back into the dishwasher and smell.
• Plastic item too close to the heating element A lightweight dish, utensil, or rack part that has fallen or shifted near the heater produces a hot-plastic or burnt smell during the dry cycle.
• Low-use stagnation and bacterial growth Dishwashers that sit unused for long periods develop biofilm and odor in the pump, screens, and hoses even without visible food debris.

How to Diagnose and Fix

1. Note the odor type (rotten food, sewer, musty, or burning plastic) because that directs your inspection priority.
2. Remove the lower dish rack and pull out the filter assembly and any sump screens at the tub floor.
3. Clean the filter, screens, and sump area thoroughly with warm water and a soft brush to remove all trapped food and residue.
4. Inspect and clean both spray arms by removing them and flushing the spray ports under running water.
5. Wipe down the door gasket, tub edges, and any visible seals with a damp cloth to remove buildup and biofilm.
6. Check the drain hose under the sink for kinks, proper high-loop routing, and secure connection to the disposal or drain line.
7. Run an empty hot cycle with a dishwasher cleaner product to dissolve hidden film and residue throughout the system.
8. If you smell burning plastic, stop the cycle immediately, inspect the heating element area for contact or melted items, and remove any debris or misplaced plastic.

Parts You Might Need

Related Error Codes

If your appliance also shows a code on the display, these match this problem:

• Kenmore Dishwasher E04 error code
• Kenmore Dishwasher E05 error code
• Kenmore Dishwasher E06 error code
• Kenmore Dishwasher E07 error code
• Kenmore Dishwasher E08 error code
• Kenmore Dishwasher E09 error code
• Kenmore Dishwasher E10 error code
• Kenmore Dishwasher E11 error code
• Kenmore Dishwasher E12 error code
• Kenmore Dishwasher E13 error code
• Kenmore Dishwasher E14 error code
• Kenmore Dishwasher F1E1 error code

When to Call a Pro

If the odor returns immediately after a thorough cleaning, or if you find standing water that does not drain even after clearing the filter and hose, call a technician. Persistent smells can indicate a failing drain pump, a cracked sump component, or internal hose damage that requires disassembly and parts replacement. Because Kenmore dishwashers are built by several manufacturers, a qualified appliance tech will have the correct service manual and parts cross-reference for your specific model.