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

LG Dishwasher Not Draining or OE Error? Filter, Drain Hose Height, Air Gap, Knockout Plug and Cancel & Drain 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:

• Turn the dishwasher off before cleaning the air gap or internal parts. LG warns about electric shock or malfunction otherwise. For anything beyond the filter, switch off the breaker too.
• Hot water and parts. LG says wait about 30 minutes after the dishwasher stops before removing the filter, because the tub is hot right after a cycle.
• Sharp edges. LG warns the stainless steel filter has sharp edges. Handle it carefully.
• Water on the floor or an AE / E1 (leak) code. Turn it off and find the leak before running it again.
• You smell burning, see damaged wiring, or the breaker trips again. Stop and call a qualified technician.
• The dishwasher is still under warranty (LG: 1 year parts and labor on most models, 2 years on some). Use LG service before you open panels.
• Recall check: search your model on the CPSC recall site before paying for a repair.

If none of these apply, the free checks below are safe for most owners.

Fix order at a glance (cheapest first)

DIY tiers: Easy (no panels off) · Moderate (hoses or under-sink work, power off) · Advanced (wiring connectors or several parts) · Pro only (mains wiring, or still under warranty).

Which LG dishwasher do you have?

Find the model and serial number on the label along the side edge of the inner door or tub opening. You need it to order parts, find your filter layout, and check warranty status.

Prefixes are examples, not a full list. LG says the look and position of filters vary slightly by model; your owner's manual has the exact steps.

Five-minute checks before you call anyone

1. Was the power interrupted? LG says if water remains when you open the door, the power may have cut out mid-cycle (an outage or a tripped breaker). When the dishwasher starts again, it drains first. Press Power and restart.
2. Clean the filter (LG's steps). Remove the lower rack. On many models, turn the bottom spray arm so the wider "V" faces the front. Turn the inner (mesh) filter counterclockwise and lift out the mesh, stainless, and outer filters. Separate the cylinder-shaped filters and brush them gently under warm running water; use non-abrasive materials. Reassemble and turn clockwise until it clicks. LG says a filter that's put back wrong lowers cleaning performance.
3. Hose under the sink. Look for the ridged hose (white, opaque, or gray). Move anything pushing on it and straighten bends.
4. Air gap. Turn the dishwasher off. Remove the air gap cover and the plastic cap under it. Clear debris with a toothpick or brush. LG suggests using a turkey baster to flush it with hot water. Refit the cap and cover.
5. Disposal. Make sure the sink and disposal drain normally.
6. First cycle after install? LG says OE on the first cycle points to an installation problem: the hose is kinked, too high, or too long. That's for the installer to correct.
7. New disposal? The dishwasher inlet on the disposal may still have its knockout plug. LG's steps show it removed with a hammer and screwdriver; LG says an installer or plumber should do it.
8. Force a drain. Cancel & Drain (two buttons held together, for example Delicate + Dual Control on some models). Or start any cycle, wait 45 seconds, and power off.
9. Test. Run Heavy Duty or Normal, empty, with no detergent, to flush it and test the drain.

How to know it's fixed: the test cycle finishes with no OE and only a little water left around the filter, and the sink stays clear. LG then suggests a full clean: filter, spray arms, and an empty cycle with a cup of vinegar or a dishwasher cleaner.

LG dishwasher codes linked to "not draining"

LG's US help library lists these. Codes vary by model.

ApplianceDB code → part map (drain-related LG dishwasher codes):

Code meanings from LG USA Support's "OE Error Code - Dishwasher" and "How to Fix an LG Dishwasher That Is Not Draining (OE Error)" (sources 1–2) and LG's dishwasher error-code pages (source 3), checked directly 2026-10-30. The code → part map comes from the open ApplianceDB sample (source 9), which links each LG code to a component, a ranked fix, and a DIY difficulty and cites LG's US error-code list. Data © ApplianceDB contributors, used under the Open Database License (ODbL) v1.0. Your owner's manual has the final list for your model.

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

Diagnose by symptom → likely part

1. Dirty water over the filter; OE; odor

Likely causes: a clogged 3-stage filter or debris in the sump. LG notes leftover food in the filter can also cause odor and drainage problems.

DIY difficulty: Easy.

2. OE on the first cycle, or water backs up from the sink

Likely causes: a kinked or crushed hose, a hose end outside 12–40 inches above the floor, a hose longer than 12 feet or with an extension, a knockout plug left in the disposal, or a clogged air gap. LG's Korean-market article on the same US help site adds that a hose end set too low can let sewer odor and sink water flow back.

DIY difficulty: Easy to straighten; Moderate to re-route or replace the hose.

3. Hum but no drain; Cancel & Drain does nothing; OE keeps returning

Likely causes: a jammed or failed drain pump (ApplianceDB's top OE component), or a stuck check valve.

Signs: filter, hose, air gap and sink are all clear; you hear a hum, or nothing, at drain time.

DIY difficulty: Advanced (pump); Moderate (check valve).

4. No drain sound at all; display errors

Likely causes: the control board (main or display) or wiring to the pump.

DIY difficulty: Advanced; diagnose first before buying a board. LG's warranty covers the main control board as a part for up to 5 years on many models.

Prevent it next time

• Clean the filter often. LG says after each load for best results, at least monthly in hard-water areas; its OE guidance mentions every one to two weeks.
• Scrape large food off dishes before loading.
• Keep the hose clear under the sink: don't store heavy items on it.
• After any plumbing or disposal work, check the knockout plug and hose height.
• Run a cleaning cycle now and then: an empty cycle with a cup of vinegar or a dishwasher cleaner (LG).

Related guides

• LG dishwasher not cleaning
• Samsung dishwasher not draining
• Whirlpool dishwasher not draining
• GE dishwasher not draining

What LG's warranty covers on a dishwasher

LG's US dishwasher warranty cards (they vary by model; your card or LG's site has yours):

What this means for a dishwasher that won't drain: a failed drain pump or board in year 1 (or year 2 on 2-year models) is a warranty repair. After that, the main control board may still be covered as a part, so you'd pay only labor; the drain pump isn't on the extended-parts list. Cleaning the filter, clearing an air gap, removing a knockout plug, and correcting hose installation are maintenance or installation, not defects. Keep your proof of purchase.

→ Check your model's warranty on LG's site · Schedule an LG repair · LG customer service 1-800-243-0000

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

1. Warranty: year 1 (or 2) parts and labor; 5-year main board parts; plus retailer or credit-card extended protection.
2. Recalls: search your model at the U.S. Consumer Product Safety Commission's recall site: cpsc.gov/Recalls. A recall repair is free.
3. Free fixes done: power restart, filter, hose, air gap, sink and disposal, knockout plug, hose height and length, Cancel & Drain, empty test cycle.
4. Written quote: ask for part, labor, and trip fee as separate lines, and whether the tech checked the hose height and knockout plug first.

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

Part prices checked 2026-10-30 on Sears PartsDirect public search pages (S1–S6). Pro-cost cells tagged [GUIDE] from G1 (Fixr) and G2 (HomeGuide), re-read 2026-10-30; [GUIDE] figures are national averages, not LG-specific quotes except where marked. Prices change; confirm with your model number.

Tip: tell the tech whether the pump hums or is silent, whether Cancel & Drain empties the tub, whether the sink drains, and whether a disposal was recently installed.

Repair vs. replace calculator

1. What's the all-in repair cost? → R = trip/diagnostic fee + part + labor + tax, minus anything LG's warranty (or a recall) covers
2. What does a comparable new dishwasher cost, all-in? → N = unit + installation + haul-away (+ new hoses or install kit)
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 new LG dishwasher shows OE on its very first cycle. The installer finds the drain hose kinked behind the cabinet and the disposal's knockout plug still in place, and fixes both. R = $0.
→ Not a repair.

Worked example 2 (illustrative numbers): A 5-year-old LG dishwasher hums and shows OE; the filter, hose, and air gap are clear. A tech replaces the drain pump: R = $280; N = $900; no other repairs.
280 ÷ 900 = 31%; life used 5 ÷ 11 = 45%; repeat check 31% → Repair.

Worked example 3 (illustrative numbers): A 10-year-old LG dishwasher needs a main control board (past its 5-year parts coverage) after a drain pump last year for $260. R = $450; N = $900.
450 ÷ 900 = 50%; life used 10 ÷ 11 = 91%; repeat check (450 + 260) ÷ 900 = 79% → Replace.

Tips toward replacing: a board on an older dishwasher, a second big repair in about 2 years, rusted racks, or a leaking tub.
Tips toward repairing: it's a filter, hose, check valve, or pump; the dishwasher is under about 8 years old; the board is inside LG's parts coverage; or the real fix was the hose, plug, or air gap.

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: once it has used more than half its expected life, the same repair buys fewer years.

Who services LG dishwashers near you

1. LG (warranty or factory service). In year 1 (or year 2 on 2-year models), start with LG. LG says if OE returns after all its steps, the unit needs repair service.
→ LG: request a repair · 1-800-243-0000

2. The installer or a plumber. For OE on the first cycle, a knockout plug, hose height or length, or a clogged sink drain.

3. A partner appliance pro (out of warranty).
Our call line connects you with an independent appliance repair provider in your area. Tell them about the OE code, whether it hums, whether Cancel & Drain works, and your model number.

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 check the filter, hose height and length, knockout plug, and air gap first?
• Is it the pump, the valve, or the control? How did you confirm it?
• Is the board covered as a part under LG's warranty?
• 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 and installation problems. A dishwasher that's already broken is usually not covered.

FAQ

What does OE mean on an LG dishwasher?
OE means the dishwasher isn't draining properly. LG says it's most often a food clog or an installation issue such as a kinked hose.

How do I clear the OE code on my LG dishwasher?
Clean the filter, straighten the drain hose, clean the air gap, check for a disposal knockout plug, then run an empty Heavy Duty or Normal cycle. If OE returns, LG says the unit needs repair service.

How do I force my LG dishwasher to drain?
Use Cancel & Drain (hold the two buttons your model uses, for example Delicate + Dual Control). Without that option, start a cycle, wait 45 seconds, and power it off; LG says the first 45 seconds of every cycle is drain-only.

How high should an LG dishwasher drain hose be?
LG says the hose end must be 12 to 40 inches above the floor, and the hose no longer than 12 feet, with no extension.

How often should I clean my LG dishwasher filter?
LG says after each load for best results, and at least monthly in hard-water areas. Some LG models have a self-cleaning filter that doesn't need it.

Why is there water in my LG dishwasher after a power outage?
LG says if the power cut out mid-cycle, water can stay in the tub. When you start the dishwasher again, it drains first.

Is it worth fixing an LG dishwasher that won't drain?
Usually. Most causes are free, and a drain pump is a common, moderate repair. A board on an older dishwasher leans toward replacing, unless it's still inside LG's parts coverage. Use the calculator above.

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 household plumbing, call a qualified pro.
Last updated: 2026-10-30.

Sources

1. LG USA Support: "OE Error Code - Dishwasher" (07/25/2025) (drain issue, most often food clogs or installation; remove debris, maintenance, empty Heavy Duty or Normal test cycle without detergent; filter steps: lower rack, mesh filter counterclockwise, mesh, STS, and outer filters, non-abrasive cleaning with warm water, clockwise until it clicks; clean after each load, at least monthly with hard water; some models have a self-cleaning filter; sharp edges on the stainless filter; drain hose ridged, white, opaque, or gray, kinks; air gap: unit off, cover and cap off, toothpick or brush, turkey baster with hot water; OE on the first cycle = installation issue; hose no longer than 12 feet, no extension; hose end at least 12 inches and within 40 inches from the base; knockout plug removed by installer or plumber; Cancel & Drain by holding two buttons, e.g. Delicate + Dual Control; otherwise start a cycle, wait 45 seconds, power off; request a repair if OE returns; clean fully with vinegar or cleaner afterward). https://www.lg.com/us/support/help-library/oe-error-code-dishwasher--20150986144736 (accessed 2026-10-30)
2. LG USA Support: "How to Fix an LG Dishwasher That Is Not Draining (OE Error)" (07/31/2026) (turn off before cleaning the air gap or internal parts; causes: food debris, crushed or kinked hose, hose over 12 ft or end outside 12–40 inches, knockout plug; filter steps; run a cleaning cycle with vinegar or dishwasher cleaner; contact LG if OE persists). https://www.lg.com/us/support/help-library/how-to-fix-an-lg-dishwasher-that-is-not-draining--20155352254013 (accessed 2026-10-30)
3. LG USA Support: "[LG Dishwasher] Guide to Error Codes" (IE water inlet; OE: clean the filter every one to two weeks, check the outlet hose; codes differ by model) and LG dishwasher error code list. https://www.lg.com/us/support/help-library/lg-dishwasher-guide-to-error-codes--20154464775480 · https://www.lg.com/us/support/help-library/lg-dishwasher-error-code-list--20150933422943 (accessed 2026-10-30)
4. LG USA Support: "[LG Dios dishwasher] 'OE' appears on the display" (Korean-market model article on LG's US help site: wait about 30 minutes before removing the filter; hose end at least 30 cm above the floor or sewer odor and backflow; water left after a power cut drains when restarted). https://www.lg.com/us/support/help-library/lg-dios-dishwasher-oe-appears-on-the-display--20153080400228 (accessed 2026-10-30)
5. LG US dishwasher owner's manual (filters: clean after each load for best results, at least monthly with hard water; codes; LG customer service 1-800-243-0000). https://www.lg.com/us/support/products/documents/Owners%20Manual.pdf (accessed 2026-10-30)
6. LG US dishwasher limited warranty cards: 1-year parts and labor (DSW_1YR) or 2-year parts and labor (DSW_2Y) depending on model; 5-year main control board and racks; 10-year Direct Drive motor; limited lifetime stainless tub and door liner (parts only after the base period). https://www.lg.com/us/PDF/warranty/ha/DSW_1YR.pdf · https://www.lg.com/us/PDF/warranty/ha/DSW_2Y.pdf (accessed 2026-10-30); LG warranty information https://www.lg.com/us/support/warranty
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. ApplianceDB free developer sample (LG US dishwasher codes with component, ranked fix, and DIY difficulty; OE → drain pump: clear the drain, then replace the drain pump motor; BE detergent system; E1 flow switch; PF control board; cites LG's US error-code list). Data under the Open Database License (ODbL) v1.0. https://github.com/ApplianceDB/ApplianceDB-public (accessed 2026-10-30)
10. Part prices: Sears PartsDirect public search pages, see S-list below (accessed 2026-10-30).
11. Repair cost guides: Fixr (G1) and HomeGuide (G2), see list below (accessed 2026-10-30).

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

• S1. Search "lg dishwasher drain pump": ABQ73503004 $74.44, EAU62043403 $108.76, ABT72909202 $281.37, ABT72989206 $292.17 (case assembly, pump-to-sump hose, and Whirlpool and GE pumps excluded). https://www.searspartsdirect.com/search?q=lg%20dishwasher%20drain%20pump
• S2. Search "lg dishwasher drain hose": AEM69493807 $43.89, AEM74333104 $67.93; drain hose connector MEJ62504601 $25.23; drain pump-to-sump hose MEJ61885701 $25.23 (other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dishwasher%20drain%20hose
• S3. Search "lg dishwasher check valve": 5220ED4004A $10.57, sump check valve MJX32862501 $10.57, ABQ73502701 $25.23, drain check valve MJX63511301 $28.91 (other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dishwasher%20check%20valve
• S4. Search "lg dishwasher filter": lower filter MDJ62185601 $5.94; coarse filters ADQ73234005 $41.05, MDJ64544301 $66.48 (retainer, noise filters, and other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dishwasher%20filter
• S5. Search "lg dishwasher control board": EBR33469708 $57.34, EBR72910102 display board $291.82, AGM76429502 $314.00, AGM76429512 $314.00, EBR73739204 $314.00, AGM76429509 $316.86, EBR79686304 $332.96, AGM76429511 $344.96, EBR73739203 $368.12, EBR79686301 $368.12, EBR79686303 $368.12, EBR86473413 $372.41, EBR86473410 PCB assembly $408.48 (Whirlpool board excluded). https://www.searspartsdirect.com/search?q=lg%20dishwasher%20control%20board
• S6. Search "lg dishwasher sump": sump AJH32598001 $15.64, sump cover ABQ73502601 $44.24, sump gasket MDS58387601 $76.11, sump cover ACQ88920601 $81.14 (tabs, hoses, and other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dishwasher%20sump

Pro-cost guide sources [GUIDE] (US national averages, parts + labor, not brand-specific quotes unless noted; 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: LG $50–$600; diagnostic fee $50–$75; labor $50–$100 per hour; 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 (part $20–$100); 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 LG Electronics. "LG", "QuadWash", and "TrueSteam" are trademarks of their owners and are used here only to describe the products we cover.

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• 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: Turn the dishwasher off (and the breaker for anything beyond the filter) before reaching into the sump or disconnecting hoses. If you're unsure, call a qualified professional.

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