Last updated: 2026-10-30 · By Fix It or Replace editorial team

KitchenAid Dishwasher Not Draining? Filter, Drain Hose, Disposal Knockout Plug, Air Gap and F9E1 Fixes, Costs and Repair vs Replace (2026)

Verdict at a glance

Safety check before any DIY (30 seconds)

Stop and don't start the DIY steps below if any of these is true:

• You smell burning, see damaged wiring, or the breaker trips repeatedly. KitchenAid says stop and contact a qualified service technician.
• The dishwasher is hard-wired and you're not comfortable removing panels. KitchenAid says schedule service rather than proceeding.
• Water is on the floor, or F8E4 (water in the drip tray) is showing. Shut off the water supply and see the leak notes below before you run another cycle.
• The dishwasher is in its first year. KitchenAid covers parts and labor for one year; use KitchenAid service first.
• Recall check: search your model on the CPSC recall site before paying for a repair.

Always switch the power off at the circuit breaker (KitchenAid: don't rely on the control panel alone), confirm the lights are off, and shut off the water supply valve under the sink before you open the filter area or disconnect hoses. Wear gloves: the sump can hold broken glass. Never pour drain-opening chemicals into the dishwasher; KitchenAid warns they can damage parts and create safety hazards.

Fix order at a glance (cheapest first)

DIY tiers: Easy (no tools, no panels) · Moderate (hoses or sump, power and water off) · Advanced (lower panel off, wiring connectors) · Pro only (electronics, hard-wired power, or still under warranty).

Which KitchenAid dishwasher do you have?

KitchenAid's manual says the model and serial number label is near the door, on the right-hand or left-hand side of the dishwasher interior. You need it to order the right filter, pump, or hose.

Model prefixes are examples, not a full list. KitchenAid is part of the Whirlpool family, so many KitchenAid dishwashers use W / WP / WPW part numbers. Always order by your exact model number.

Five-minute checks before you call anyone

1. Finish or cancel the cycle. If the START/RESUME light is blinking, the cycle was paused; close the door and press it. To force a drain, KitchenAid's manual says: open the door slightly, wait for spraying to stop, press and hold CANCEL/DRAIN once, then close the door. The dishwasher drains if water remains; the light goes off after 2 minutes.
2. Bail out standing water. Towels down, a cup into a bucket, then a turkey baster or hand pump for the sump.
3. Clean the filters. Remove the lower rack. Upper filter assembly: turn a ¼ turn counterclockwise and lift out. Lower filter: grab the round opening, lift slightly, pull forward. Rinse under running water; use a soft brush for stubborn soil or hard-water deposits (no wire brush or scouring pad). Reinstall: lower filter flat under the tabs, upper filter turned clockwise until it drops and locks. KitchenAid warns never run the dishwasher without the filters locked in place.
4. Look in the sump. Flashlight in; pull out labels, seeds, toothpicks, food, and glass.
5. Check the hose and sink connection. Under the sink and behind the toe panel: no kinks, crushing, or sags; a high loop secured to the underside of the counter, or an air gap. If water spills out of the air gap into the sink when the dishwasher drains, KitchenAid says the blockage is downstream (hose-to-drain or sink plumbing).
6. Disposal. If it's new or was replaced, make sure the knockout plug was removed. Run the disposal to clear food, then start a drain.
7. Power-cycle. KitchenAid: unplug for 30 seconds (or breaker off 30 seconds if hard-wired), then restore power.

How to know it's fixed: run a short Rinse cycle and listen for the drain pump. Only a little water should sit around the sump afterward, no water should come back up, and F9E1 shouldn't return.

KitchenAid dishwasher codes linked to "not draining"

KitchenAid lists these on its US Product Help error-code pages. Digital models show F#E#; light-only models flash the code (count the first flashes for F, pause 1–2 seconds, count the second set for E; a longer ~5-second pause before it repeats).

Which part each code points at, and how hard the fix is:

Code meanings from KitchenAid's US Product Help pages "Dishwasher Error Codes - Reading", "F9E1 - Dishwasher", and "F9E2 - Dishwasher" (sources 3–5), checked 2026-10-30, plus the blinking-light note in KitchenAid's User Instructions (source 6). The open ApplianceDB sample (source 11) maps Samsung and LG codes to components and DIY difficulty; it has no KitchenAid entries, so we used KitchenAid's own pages for every code here. Codes vary by model; your manual has the final list.

Diagnose by symptom → likely part

1. Water slightly above the filter; drains slowly

Likely causes: a clogged filter or sump, or a partial restriction in the drain hose. KitchenAid says many "clogged dishwasher" complaints come from neglected filters or food in the sump.

Signs: cloudy water above the filter; slow drain; gritty dishes.

DIY difficulty: Easy.

2. Water near the door opening; nothing drains

Likely causes: a severe blockage (knockout plug left in, clogged disposal, crushed or clogged hose) or a drain pump that isn't running (KitchenAid's snapshot).

Signs: full tub; no change after Cancel/Drain; F9E1.

DIY difficulty: Moderate. KitchenAid's steps: loosen the clamp, take the hose off the disposal or sink tailpiece, check both ends for debris, and flush the hose with warm water or a garden hose; use a flexible plastic line or dishwasher-safe brush for stubborn clogs, never sharp tools. Check the sink tailpiece and trap too.

3. Steady hum or grinding, but no water moves; or F9E2

Likely causes: a jammed drain pump impeller (KitchenAid: a steady hum with no water movement), hard debris such as glass in the pump area (grinding), or a failed drain pump motor (F9E2 = drain motor error).

Signs: humming during drain; grinding; F9E2 after the drain path is clear.

DIY difficulty: Moderate to clear debris from the sump and check that the impeller turns; Advanced to replace the pump.

Call a pro if: the impeller turns freely and the hose is clear, but the pump still won't move water.

4. No pump sound at all during drain

Likely causes: an electrical or control problem. KitchenAid's snapshot lists the door switch, wiring, pump voltage, and the timer / control board; on certain older designs, a drain solenoid.

Signs: the cycle pauses without the drain pump starting; F6E1 on some models; the Clean light blinking 4 times in a row.

DIY difficulty: Pro only.

5. Drains, but suds or water come back; or water spills from the air gap

Likely causes: suds from the wrong detergent (hand-dish soap, laundry detergent), too much detergent, or a rinse-aid cap left off (KitchenAid's manual); a downstream clog (air gap spilling); or a hose without a high loop letting sink water flow back.

What to do: use dishwasher detergent only, measured for your water; clean the air gap and the hose-to-drain path; fix the high loop or air gap per your installation instructions.

Prevent it next time

• Scrape, don't pre-rinse. KitchenAid says scrape plates; its detergent needs food soil to act on.
• Clean the filters on KitchenAid's schedule. If you only scrape before loading, the manual's chart says about twice a year at 1–7 loads a week and every 3 months at 8–14 loads; if you don't scrape or rinse at all, anywhere from every 2 months (1–3 loads a week) to weekly (13–14 loads). In very hard water (over 15 grains), clean them at least monthly.
• Keep the high loop after any under-sink work or disposal replacement.
• Clean the air gap occasionally (cover off, cap unscrewed).
• Run the hot tap at the sink before starting a cycle.
• Use only automatic-dishwasher detergent, measured for your water hardness.

Related guides

• Whirlpool dishwasher not draining
• Bosch dishwasher not draining
• GE dishwasher not draining
• LG dishwasher not draining

What KitchenAid's warranty covers on a dishwasher

Per the KitchenAid Dishwasher Limited Warranty in KitchenAid's US User Instructions (W10579121C; check the warranty that came with your model):

What this means for a dishwasher that won't drain: a failed drain pump in year 1 is covered. After year 1, the pump, hose, and check valve aren't on that model's extended list, but the electronic control is, parts-only, through year 5. (The covered-parts list differs by model and year, so read the warranty sheet that came with your dishwasher.) KitchenAid's manual says the external drain air gap isn't part of the dishwasher, and service costs for cleaning or repairing it aren't covered. KitchenAid also excludes service to correct improper maintenance or installation and house plumbing, plus damage from freezing. Keep your proof of purchase.

→ KitchenAid Customer eXperience Center: 1-800-422-1230 · KitchenAid Product Help

Before you pay for any repair: a 4-point check

1. Warranty: year 1 parts and labor; electronic controls parts-only through year 5; retailer or credit-card extended protection.
2. Recalls: search your model at cpsc.gov/Recalls. A recall repair is free.
3. Free fixes done: Cancel/Drain, filters and sump, hose and high loop, knockout plug, disposal, air gap, power cycle. A service visit for a clogged filter or air gap isn't a warranty repair.
4. Written quote: ask for part, labor, and trip fee as separate lines, and ask how the tech confirmed the pump (or control) failed.

What it costs: repair parts and pro service (2026)

Part prices checked 2026-10-30 on Sears PartsDirect public search pages (S1–S5). Pro-cost cells tagged [GUIDE] from G1 (Fixr) and G2 (HomeGuide), re-read 2026-10-30; [GUIDE] figures are national averages, not KitchenAid-specific quotes except where marked. Prices change; confirm with your model number.

Tip: before you buy a pump, take the hose off at the sink end and flush it. A clogged hose or a knockout plug looks exactly like a dead pump from inside the tub.

Repair vs. replace calculator

1. What's the all-in repair cost? → R = trip/diagnostic fee + part + labor + tax, minus anything KitchenAid's warranty (or a recall) covers
2. What does a comparable new dishwasher cost, all-in? → N = unit + delivery + installation + haul-away
3. How old is your dishwasher, and how long should it last? → Age and Life (use about 11 years, near the middle of HomeGuide's 8–15-year range, if you don't know)
4. How much have you spent on repairs in the last 2 years? → Past

Step A — Cost ratio: R ÷ N
Step B — Life used: Age ÷ Life
Step C — Repeat-repair check: (R + Past) ÷ N

Repeat-repair rule: if Step C is over 50%, treat it like the bottom-right box: money keeps going into the same machine. And if the part is no longer available for your model, that decides it: replace.

Worked example 1 (illustrative numbers): A 1-year-old KitchenAid won't drain after a new disposal was installed. The knockout plug was still in; removing it fixes the drain. R = $0.
→ Not a repair.

Worked example 2 (illustrative numbers): A 7-year-old KitchenAid hums and won't drain; a tech replaces the drain pump: R = $280; N = $1,200; no other repairs.
280 ÷ 1,200 = 23%; life used 7 ÷ 11 = 64%; repeat check 23% → Repair (top-right box: usually fine).

Worked example 3 (illustrative numbers): An 11-year-old KitchenAid has no pump sound and F6E1; a tech quotes a control board at R = $480, and last year it needed a drain pump for $300. N = $1,200.
480 ÷ 1,200 = 40%; life used 11 ÷ 11 = 100%; repeat check (480 + 300) ÷ 1,200 = 65% → Replace.

Tips toward replacing: a control board on a dishwasher 10+ years old (Fixr notes parts for 10-year-old appliances can be hard to find), a second big repair within about 2 years, or a leak that damaged the floor or cabinets.
Tips toward repairing: it's a filter, hose, check valve, or pump; the dishwasher is under about 7 years old; it's in year 1; or the failed part is an electronic control in years 2–5 (parts covered on W10579121C-era models).

Why 50%? It's the common rule of thumb, and the one we use. Some technician checklists draw the line a little higher, at about 60% of a new dishwasher's price, so treat a repair that costs 50–60% of new as a second-quote zone, not an automatic replace. The older the dishwasher, the lower the line should go.

Who services KitchenAid dishwashers near you

1. KitchenAid (warranty or official service). In year 1, or for an electronic control in years 2–5, start with KitchenAid. KitchenAid says warranty service is provided only by its authorized service providers.
→ KitchenAid Product Help: schedule service · KitchenAid Customer eXperience Center 1-800-422-1230

2. A partner appliance pro (out of warranty).
Our call line connects you with an independent appliance repair provider in your area. Tell them the code (if any), whether you hear the pump, whether the filter and hose are clear, and whether the disposal is new; it speeds up the diagnosis.

3. A plumber. For a clogged sink trap, disposal problems, a missing high loop, or an air gap that keeps backing up.

4. DIY with the right part. Filters, hoses, and check valves are common DIY jobs. Order by your exact model number.

Questions to ask any technician:

• Did you clear the filter, hose, disposal, and air gap first?
• Does the pump hum, run, or stay silent, and how did you test it?
• Is this part covered by my warranty's years 2–5 list?
• Can you split the quote into part, labor, and trip fee?

Optional: is an appliance warranty worth it?

A home warranty (service contract) can cover repairs for a yearly fee plus a per-visit service fee. Read the exclusions carefully: many plans exclude clogs, plumbing outside the appliance, and air gaps. A dishwasher that's already broken is usually not covered. KitchenAid suggests asking KitchenAid or your retailer about an extended warranty if you want longer coverage.

FAQ

Why is my KitchenAid dishwasher not draining?
KitchenAid's most common causes: a clogged filter or sump, a kinked or blocked drain hose, a disposal or sink-connection problem (including a knockout plug left in a new disposal), or a jammed drain pump. Less often, a control, timer, or (on older designs) drain solenoid.

How do I force my KitchenAid dishwasher to drain?
Open the door slightly, wait for the spraying to stop, press and hold CANCEL/DRAIN once, and close the door. It drains if water remains; the light goes off after about 2 minutes.

What does F9E1 mean on a KitchenAid dishwasher?
Long drain (not draining). Clean the filter, check the hose for kinks or clogs, clear the disposal and remove its knockout plug on new installs, and clear the air gap.

What does F9E2 mean on a KitchenAid dishwasher?
A drain motor error. Clear the drain path and power-cycle; KitchenAid says schedule service if it returns.

How do I reset my KitchenAid dishwasher?
Unplug it for 30 seconds, or switch off its breaker for 30 seconds if it's hard-wired, then restore power.

How often should I clean my KitchenAid dishwasher filter?
It depends on loads and how you prep dishes. KitchenAid's chart runs from once a year (if you rinse first) to weekly (heavy use, no scraping); monthly in very hard water.

Is some water in the bottom normal?
A little water around the sump after a cycle is normal. Water above the filter or near the door means a restriction or a pump that isn't running.

How much does it cost to fix a KitchenAid dishwasher that won't drain?
Often nothing: most cases are the filter, hose, disposal, or air gap. OEM drain pumps for KitchenAid were about $50 to $197 on Sears PartsDirect when we checked on 2026-10-30. Cost guides put a pump replacement at $100 to $400 installed, and Fixr's KitchenAid dishwasher repairs range from $50 to $600.

About the author

Fix It or Replace editorial team — We research appliance repairs using manufacturer documentation, parts-supplier data, and current US cost guides, and we cite every source below. We are not appliance technicians; for anything involving wiring or plumbing you're unsure about, call a qualified pro.
Last updated: 2026-10-30.

Sources

1. KitchenAid Product Help (US): "Dishwasher Not Draining" (common causes: clogged filter, sump debris, kinked or blocked hose, disposal or sink connection, jammed drain pump; less commonly timer, drain solenoid on older designs, control board; how the drain works, high loop or air gap; diagnostic clues: water above filter, water near door, steady hum = jammed impeller, grinding = hard debris, no pump = electrical/control; safety: breaker off, not the control panel, water off; stop for burning smell, damaged wiring, repeated trips; hard-wired: schedule service; bail water, turkey baster; no drain chemicals; filter removal and cleaning, sump inspection; disconnect and flush the hose, knockout plug, tailpiece and trap; air gap spill = downstream blockage; prevention tips; troubleshooting snapshot). https://producthelp.kitchenaid.com/Dishwashers/Product_Info/Dishwasher_Product_Assistance/Dishwasher_Not_Draining (accessed 2026-10-30)
2. KitchenAid Product Help (US): "Newly Installed Dishwasher Not Draining" (knockout plug a common misdiagnosis; run the disposal; high loop or air gap per local code; hose not pinched, crushed, or sharply bent; secure clamp; match installation instructions). https://producthelp.kitchenaid.com/Dishwashers/Product_Info/Dishwasher_Product_Assistance/Newly_Installed_Dishwasher_Not_Draining (accessed 2026-10-30)
3. KitchenAid Product Help (US): "Dishwasher Error Codes - Reading" (F#E# display; flashing-light reading; F8E4 drip tray; F7E2 wash motor; F9E1 long drain; F6E1 user interface/main control; H20 not detecting water; power cycle 30 seconds, unplug or breaker). https://producthelp.kitchenaid.com/Dishwashers/Product_Info/Dishwasher_Product_Assistance/Dishwasher_Error_Codes_-_Reading (accessed 2026-10-30)
4. KitchenAid Product Help (US): "F9E1 - Dishwasher" (check drain line for kinks; cycle power; knockout plug; obstructions in drain or disposer; hose routing; excessive suds). https://producthelp.kitchenaid.com/Dishwashers/Dishwasher/Error_Code_or_Flashing_Lights/Error_Codes/F9E1_-_Dishwasher (accessed 2026-10-30)
5. KitchenAid Product Help (US): "F9E2 - Dishwasher" (drain motor error; knockout plug; clogs; straighten hose; routing inside the frame; cycle power; schedule service if it returns). https://producthelp.kitchenaid.com/Dishwashers/Dishwasher/Error_Code_or_Flashing_Lights/Error_Codes/F9E2_-_Dishwasher (accessed 2026-10-30)
6. KitchenAid Dishwasher User Instructions W10579121C (model/serial label near the door on the tub side; Canceling a Cycle: hold CANCEL/DRAIN, drain, light off after 2 minutes; filtration system: upper filter ¼ turn counterclockwise, lower filter, cleaning intervals chart, very hard water over 15 grains monthly, don't run without filters locked; drain air gap is external plumbing, cleaning/repair costs not covered; troubleshooting "Water remains in the tub / will not drain": cycle complete, knockout plug, hose kinks, food obstructions, house fuse or breaker; suds sources; blinking Clean light 4 times = call for service; freezing damage not covered; limited warranty: 1 year parts and labor, years 2–5 parts only for nylon dish racks and electronic controls, lifetime parts and labor on stainless tub and inner door liner; exclusions; 1-800-422-1230). https://www.kitchenaid.com/content/dam/global/documents/201605/owners-manual-W10579121-RevC.pdf (accessed 2026-10-30)
7. U.S. Consumer Product Safety Commission: recalls search. https://www.cpsc.gov/Recalls (accessed 2026-10-30)
8. Federal Trade Commission: endorsement and affiliate disclosure guidance. https://www.ftc.gov/business-guidance/resources/ftcs-endorsement-guides-what-people-are-asking
9. Part prices: Sears PartsDirect public search pages, see S-list below (accessed 2026-10-30).
10. Repair cost guides: Fixr (G1) and HomeGuide (G2), see list below (accessed 2026-10-30).
11. ApplianceDB free developer sample (checked for KitchenAid US dishwasher codes; none in the sample, so not used for this page's tables). Data under the Open Database License (ODbL) v1.0. https://github.com/ApplianceDB/ApplianceDB-public (accessed 2026-10-30)

Part price sources (Sears PartsDirect public search results, USD, accessed 2026-10-30; Whirlpool-family part numbers only, other brands excluded; prices change, confirm with your model number):

• S1. Search "kitchenaid dishwasher drain pump": WPW10531320 $50.20, WPW10348269 $52.02, W10876537 $62.34, WP6-920639 $196.83 (pump housing, plug, and other brands excluded). https://www.searspartsdirect.com/search?q=kitchenaid%20dishwasher%20drain%20pump
• S2. Search "kitchenaid dishwasher filter": W11568785 $16.45, WPW10463906 $20.10, 8268391 fine filter $42.13, W10872845 filter cup $42.56, WP8579253 $77.91, W11084156 circulation pump filter $95.09, W11643383 circulation pump filter $99.41 (Roper part excluded). https://www.searspartsdirect.com/search?q=kitchenaid%20dishwasher%20filter
• S3. Search "kitchenaid dishwasher drain hose": 8269144A $16.64, W11381654 $25.78, 3385556 $27.13, W11551233 $36.13, WPW10545278 $44.13, W11614117 $47.50, W10712310 (12 ft) $53.59, W10346255 $60.20, WP3374077 $69.27, WPW10195751 $69.76, WPW10358302 (with check valve) $70.10, WPW10171148 $117.42, WPW10171147 $118.54. https://www.searspartsdirect.com/search?q=kitchenaid%20dishwasher%20drain%20hose
• S4. Search "kitchenaid dishwasher check valve": W10567620 $14.96; WP8268375 (sump check valve) $45.94 (other brands excluded). https://www.searspartsdirect.com/search?q=kitchenaid%20dishwasher%20check%20valve
• S5. Search "kitchenaid dishwasher control board": W10479761 $153.96, W11035586 $157.65, WPW10084141 $161.01, W10866118 $165.86, WPW10285180 $167.61, W10854215 $173.76, WPW10285178 $200.43, WPW10285179 $205.67, WPW10352582 $228.24, WPW10380685 $283.25 (housings and clips excluded). https://www.searspartsdirect.com/search?q=kitchenaid%20dishwasher%20control%20board

Pro-cost guide sources [GUIDE] (US national averages, parts + labor, not brand-specific quotes unless marked; the guide pages carry 2023–2025 dates, so local quotes may differ):

• G1. Fixr, "Dishwasher repair cost" (updated January 31, 2025): pump repair $100–$250; pump replacement $150–$400; drain hose $50–$100; filter $50–$125; control panel replacement $200–$500; brand table: KitchenAid $50–$600; diagnostic fee $50–$75; labor $50–$100 per hour; parts for appliances over 10 years old can be hard to find; new dishwasher $400–$700 plus $100–$300 installation. https://www.fixr.com/costs/dishwasher-repair (accessed 2026-10-30)
• G2. HomeGuide, "Dishwasher repair cost" (byline December 22, 2023): average repair $100–$300; minimum service fee $70–$130 including the first hour, then $50–$125 per hour; drain pump replacement $100–$400; control board $200–$600; air gap installation $80–$150; replace filter $90–$175; drain hose $80–$180; dishwashers last 8–15 years; replacement $600–$1,700. https://homeguide.com/costs/dishwasher-repair-cost (accessed 2026-10-30)

Disclosure

Fix It or Replace is an independent site. We are not affiliated with, endorsed by, or sponsored by KitchenAid or Whirlpool Corporation. "KitchenAid" is a trademark of its owner and is used here only to describe the products we cover.

• Affiliate links: Some part links go to retailers such as PartSelect and RepairClinic. If you buy through them, we may earn a commission at no extra cost to you.
• Call line: Phone numbers labeled "partner pro" are operated by a third-party lead service that routes your call to an independent repair provider in your area. We may be paid for calls. We don't employ the technicians, and we don't guarantee their work, pricing, or availability. Confirm licensing, insurance, and quotes directly with the provider.
• Prices are estimates and change often. Always get a written quote.
• Safety: Switch off the breaker and the water before working on the dishwasher. Debris in the sump may be sharp. If you're unsure, call a qualified professional.

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