5 Causes, Fixes & Costs
Standing water at the bottom of a KitchenAid dishwasher is a drain-path fault — pump, filter, hose, or check valve. Most cases close on the first visit with parts from the truck.
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Quick answer
A KitchenAid dishwasher that leaves standing water usually has a clogged filter, a failed drain pump, or a blocked drain hose. KitchenAid dishwashers built on the Whirlpool platform (KDTM, KDPE, KDTE, KDFE) drain through a pump and check-valve assembly; newer models have a removable filter you twist out and rinse, while older ones use a hard-food chopper. Five failures cover most "won't drain" calls: clogged filter (or chopper on older models), failed drain pump, kinked or sediment-blocked drain hose, stuck check-valve flapper, and an air-gap or disposal blockage upstream. We diagnose in order, replace OEM, and verify two drain cycles before closing. Most repairs land $185–$385 all-in. The $149 trip fee is credited toward the repair when you approve it. 1-year written parts-and-labor warranty.
Common causes
What it is: Newer KitchenAid models use a removable filter that clogs with food, labels, or fibrous waste (artichoke leaves are the classic). Older models use a hard-food chopper that can wrap with twist-tie wire or labels. Either one can stop drain flow completely.
Fix: Pull and clean the filter (or chopper assembly on older models), run a drain cycle to verify flow, recommend pre-rinsing.
Typical all-in: $185–$245 all-in
What it is: The drain pump runs but doesn't move water (impeller stripped) or doesn't run at all (motor open or board output failed). Common in hard-water homes.
Fix: Replace OEM drain pump, verify drain flow and electrical draw.
Typical all-in: $245–$345 all-in
What it is: Drain hose sediment buildup (calcium / grease) or a kink at the cabinet pass-through. Tested by disconnecting at the disposal and running a forced drain.
Fix: Replace OEM drain hose if blocked or worn, re-route with proper high-loop, verify drain flow.
Typical all-in: $215–$315 all-in
What it is: The check valve in the sump prevents drain water from siphoning back in. Stuck closed = no drain; stuck open = standing water from sink fills back into the tub.
Fix: Replace OEM check-valve / flapper, verify drain and no back-flow.
Typical all-in: $225–$315 all-in
What it is: Plugged disposal knockout (new disposal installed without removing the dishwasher knockout) or clogged air gap. Dishwasher is fine — the path downstream isn't.
Fix: Clear knockout / air gap, re-run drain cycle. No part required.
Typical all-in: $149 trip fee only (no part needed)
Need appliance repair? Call 7am–9pm, every day.
Diagnostic order
Run the disposal first. If sink is plugged, fix the sink — dishwasher is fine.
Turn off the dishwasher's breaker and wear gloves, since broken glass and the chopper blade are sharp. Remove the lower spray arm, twist out the filter and rinse it. On older models, inspect the chopper for wraps and debris.
Start a normal cycle and immediately cancel — drain pump should run 60 seconds. No sound = pump electrical / board. Hum but no flow = stripped impeller.
Turn the breaker off before disconnecting anything. Reconnect power, then run a forced drain into a bucket. Strong flow = downstream blockage (disposal / air gap). Weak / no flow = drain pump or check valve.
Inspect the flapper, confirm drain hose has a high-loop, replace if missing.
FAQs
Most often the filter is clogged with food or debris, or the drain pump has failed. Less often it is a kinked or blocked drain hose, a stuck check valve, or a plugged disposal knockout or air gap. Start by cleaning the filter; if water still stands, a technician should test the pump. Repairs usually run $185–$385 all-in.
Most often a clogged filter or a failed drain pump — both diagnosed and fixed in a single visit. Sometimes it's actually the kitchen sink drain or a plugged disposal knockout (not the dishwasher at all).
If you're comfortable removing the bottom spray arm and filter, cleaning the filter is a 20-minute job. Turn off the breaker first and wear gloves. Anything beyond that (pump, check valve, drain hose) involves pulling the dishwasher and is faster done by a tech.
Filter / chopper cleaning lands around $185–$245. Drain-pump replacement is $245–$345. Drain-hose or check-valve work runs $215–$315. A plugged knockout or air gap is trip fee only ($149). The $149 trip fee is credited to whatever repair you approve.
KDTM, KDPE, KDTE, and KDFE models. Hard-water homes see drain-pump failures earlier; homes without garbage disposals see chopper clogs more often.
KitchenAid dishwashers are built on the Whirlpool global platform with parts availability through at least year 12. Drain repairs at $185–$345 are easily worth it on a $1,000+ unit.
Yes — we carry OEM drain pumps, check valves, filters, chopper assemblies for older models, and drain hoses.
Related coverage
See all KitchenAid repair services.
What will this cost?
Trying to decide repair vs. replace? These pages break down real all-in pricing by brand, model class, and failure mode — so you know the number before we knock.
Need appliance repair? Call 7am–9pm, every day.
