KitchenAid Dishwasher Impeller Problems — What Part Fixes This?
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Understanding the Problem
The impeller is the small plastic turbine inside the dishwasher’s wash/circulation pump that pushes water through the spray arms. When the impeller is broken, cracked, stripped, or clogged with debris it can’t move water properly, causing poor cleaning, no water circulation, or strange noises. Because the impeller is often inside the pump housing, symptoms may mimic a failed motor, blocked filter, or spray arm issue. Diagnosing an impeller issue requires inspecting the sump and pump area for broken blades, plastic debris, or obstruction. In many KitchenAid models the impeller is replaceable as an individual part, but on some models it’s sold only as part of the entire pump-and-motor assembly. Replacing a faulty impeller (or the pump assembly) restores spray pressure and normally fixes poor cleaning and related problems.
Common Symptoms
Dishes not getting clean, weak or no spray from arms, loud grinding or rattling from the base, water pooling in the tub, or error codes related to circulation or drainage.
Common Causes
- Plastic debris, broken glass, or food particles jam the impeller and prevent it from spinning.
- Impeller blades cracked, melted or worn from age/heat or foreign object damage.
- Pump housing damage or motor shaft play causing the impeller to spin improperly; or the impeller seal has failed allowing water to bypass the blades.
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at ProsourceParts.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
Remove the lower dish rack, filters and access the sump; manually spin the impeller—if it feels loose, chews or doesn’t spin smoothly, the impeller or pump housing likely needs replacement.
Frequently Asked Questions
How do I check the impeller on my KitchenAid dishwasher?
Turn off power to the dishwasher, remove the lower rack, lift out the filter assembly and spray arm. Visually inspect the sump area and gently rotate the impeller with your fingers or a small tool. Look for cracked or missing blades, plastic debris, or resistance. If the impeller doesn’t spin freely or shows damage, it likely needs replacement.
Can I replace just the impeller or must I replace the whole pump?
It depends on the model. Some KitchenAid dishwashers have a removable impeller sold separately; others require replacing the entire pump-and-motor assembly because the impeller is integrated or the small impeller alone isn’t sold separately. Check parts listings for your exact model number before ordering — if in doubt, replacing the full pump assembly ensures compatibility and fixes related seals and bearings.
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Whether your dishwasher won't drain, your dryer stopped heating, or your fridge isn't cold, we've created simple repair guides for the most common appliance problems homeowners face. Each guide explains what's going wrong, the most likely causes, and which replacement parts fix the issue. When you're ready to order, we link directly to ProsourceParts.com where you can search by model number and get the right part shipped fast.