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

LG Dryer Taking Too Long to Dry? Installation Test, d80/d90/d95, Energy Saver, Sensor Bars, Vent — Fixes, Costs, 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 gas. Don't touch switches or plugs. Leave the house and call your gas utility from outside.
• You smell burning, or the top or sides of the dryer are too hot to touch. Stop the dryer. A blocked vent is a fire risk: the US Fire Administration estimated about 2,900 residential clothes-dryer fires a year in its 2008–2010 report, with failure to clean the leading factor (34%).
• The breaker trips, or the cord or outlet is scorched. Leave it off; call an electrician. LG says to have a licensed electrician check the outlet for nP errors that don't clear.
• Unplug the dryer before you pull it out or work on the duct. On a gas dryer, don't kink or strain the gas line when you move it.
• The dryer is still under warranty (LG: 1 year parts and labor). Use LG service before you open any 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 (a panel off, power off) · Advanced (heater, wiring) · Pro only (gas, in-wall ducts, or still under warranty).

Which LG dryer do you have?

Find the model and serial number on the label, usually inside the door frame. The model number tells you whether it's electric or gas and which buttons start LG's Installation Test.

Prefixes are examples, not a full list. Your owner's manual lists your cycles and options.

Five-minute checks before you call anyone

1. Energy Saver off. Press and release it to turn it off for one cycle; on some models, hold the Energy Saver Default On/Off button 3 seconds to change the default. The light goes out.
2. Lint filter. Clean it before every load. LG suggests washing it with warm water and a soft brush and letting it dry completely before you put it back.
3. Load size and type. Only laundry that has finished spinning in the washer. Fill the drum about halfway. Separate thick and thin items. LG says a very small load can stop after about 10 minutes in automatic mode.
4. Right mode. Sensor cycles stop when anything in the load reaches the cutoff and touches the sensor, regardless of the time shown. For small loads, sheets, bulky single items, and mixed loads, LG recommends Manual or Time Dry. Adding more laundry mid-way? LG says switch to Manual or Time Dry for 30 minutes.
5. Dryness level. The cutoff is set with Dryness Level; the default is 80% or Normal.
6. Sensor bars. Wipe each bar 4–5 times with a damp cloth once a month, and let them dry.
7. Duct behind the dryer. Not crushed, dented, kinked, compressed, or coiled; no holes or loose joints; straight or a gentle S-curve.
8. Outside. Start Air Dry, find the exhaust outlet, and check the flaps open all the way. Remove lint around it; replace a cover that won't open.
9. Don't pause. LG says opening the door or pausing lowers the drum temperature, and reheating can add up to an hour. Cold rooms in winter also lengthen preheating.

How to know it's fixed: a normal half-drum load of mixed cottons dries on Normal with Energy Saver off in one cycle, without a d-code.

Run LG's Installation Test (about 2 minutes, no tools)

LG's built-in Installation Test measures internal components, reads the temperature inside the dryer, and shows an error code if it detects a problem. It's the fastest way to tell "vent problem" from "heating problem."

1. Empty the drum, clean the lint filter, and make sure the dryer is cool and off.
2. Press and release POWER, then immediately press and hold the two test buttons for your model before the startup chime ends (it may take a few tries). The display shows InS.

1. Press START/PAUSE. Note the first number shown and the highest number before the display returns to InS after about a minute. These are temperatures inside the dryer.
2. After the second minute it shows End or 0; about 20 seconds later it goes blank or flashes an error code.

How to read the result (LG's scenarios):

LG notes button combinations vary by model; your owner's manual has the final word.

LG dryer codes linked to "takes too long"

Code meanings from LG's US "LG Dryer - Error Code List(New)" and "Why is My Dryer Not Heating, Not Drying or Taking a Long Time Drying?" (sources 1–2). LG notes its guides cover all models, so your display may differ.

Fix the vent (the usual real fix)

Inside the dryer: remove lint from the tray between every load; wash the tray with warm water and a soft brush; reduce load size so air can pass from back to front.

Behind the dryer: the duct should be rigid or semi-rigid, not crushed, dented, kinked, compressed, or coiled circle over circle like a spring, with no holes or loose connections. Straight or a gentle S-curve.

Outside: run Air Dry; the flaps (or cage or mesh) should open fully. Lint can jam them.

Inside the walls: if the code persists, LG says call a dryer duct / vent cleaning specialist, and ask them to check lint, the length of the run, and the number of 90° angles, and whether modifications are needed. LG recommends professional vent cleaning once a year.

Diagnose by symptom → likely part

1. d-codes, Flow Sense, or a 2–9 degree rise

Likely cause: a restricted exhaust: lint in the duct, a crushed or foil duct, a stuck outside flap, or a run that's too long with too many elbows.

DIY difficulty: Easy for the duct behind the dryer; Pro (vent cleaner) for ducts in the walls.

2. Cycles end with damp clothes, or run very long with an HS code

Likely causes: dirty or failed moisture (humidity) sensor bars, the wrong mode for the load, or a dryness level set too low.

DIY difficulty: Easy to clean; Moderate to replace.

3. Air is cool or lukewarm; Installation Test numbers don't climb

Likely causes: a failed heating element (electric), igniter or gas valve (gas), thermostat or thermistor, or a home power problem (nP: one half of the breaker tripped).

DIY difficulty: Advanced (electric); Pro for gas.

See our LG dryer not heating guide for the full no-heat walkthrough.

4. Clean vent but weak airflow, rattling, or roaring

Likely cause: a damaged or lint-packed blower wheel.

DIY difficulty: Advanced.

Prevent it next time

• Clean the lint filter every load; wash it now and then.
• Wipe the sensor bars monthly.
• Professional vent cleaning once a year (LG).
• Half-full loads, sorted by thickness; only well-spun laundry.
• Use Time Dry for sheets, blankets, and small loads.
• Don't pause mid-cycle unless you need to.

Related guides: LG dryer not heating · LG dryer not turning on · LG dryer squeaking · Samsung dryer takes too long · Whirlpool dryer takes too long · Maytag dryer takes too long · GE dryer takes too long · LG dryer not spinning · LG washer not draining

What LG's warranty covers on a dryer

LG's 2026 US dryer limited warranty (warranty card read 2026-10-25):

What this means for slow drying: sensors, heating elements, thermostats, thermistors, igniters, and blower wheels are covered only in year 1. LG's warranty also excludes problems caused by an inadequate supply of air and improper installation, so a clogged or too-long vent is on you, even in year 1. Vent cleaning is maintenance, not a warranty repair. Keep your proof of purchase.

→ Check your model's warranty on LG's site · Schedule an LG repair

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

1. Warranty: year 1 for heating and sensor parts; retailer or credit-card extended protection.
2. Recalls: search your model at cpsc.gov/Recalls.
3. Free fixes done: Energy Saver off, lint filter washed, half loads, Time Dry where needed, sensor bars wiped, duct straightened, outside flaps checked, Installation Test run.
4. Written quote: ask for part, labor, and trip fee separately, and whether the tech checked airflow before quoting a heating part.

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: a new dryer on a clogged vent will be just as slow. If the Installation Test points to airflow, fix the vent before you decide anything else.

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. Don't count vent cleaning; you'd need it with a new dryer too.
2. What does a comparable new dryer cost, all-in? → N = unit + delivery + installation + haul-away (+ new cord or vent kit)
3. How old is your dryer, and how long should it last? → Age and Life (use about 10 years, inside Fixr's 8–12-year and HomeGuide's 8–13-year ranges, 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%, lean toward replacing. If the part is no longer available for your model, replace.

Worked example 1 (illustrative numbers): A 3-year-old LG electric dryer takes two cycles. Energy Saver was on by default and the drum was packed full. Turning it off and drying half loads fixed it. R = $0.
→ Not a repair.

Worked example 2 (illustrative numbers): A 5-year-old LG dryer shows d90. A vent cleaner clears a lint-packed in-wall run. Not counted in R (you'd need it with any dryer). R = $0.
→ Not a dryer repair.

Worked example 3 (illustrative numbers): An 11-year-old LG electric dryer's Installation Test numbers don't rise with a clean vent; the tech quotes a heating element and thermostat: R = $420; N = $800. It had a $150 sensor repair last year.
420 ÷ 800 = 53%; life used 11 ÷ 10 = 110%; repeat check (420 + 150) ÷ 800 = 71% → Replace.

Tips toward replacing: a heating part on a dryer past about 10 years, repeated repairs, or parts no longer available.
Tips toward repairing: it's settings, the vent, a sensor bar, or a thermostat; the dryer is under about 8 years old; or it's in year 1.

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 dryer's price, so treat a repair that costs 50–60% of new as a second-quote zone, not an automatic replace.

Who services LG dryers near you

1. LG (warranty). In year 1, start with LG. LG's help pages route repairs through its 24/7 Chat Support and online scheduling.
→ Schedule an LG repair

2. A dryer vent cleaning specialist. If the Installation Test points to airflow and your duct runs inside the walls, LG says a vent cleaner is the right call, not an appliance tech.

3. A partner appliance pro (out of warranty).
Our call line connects you with an independent appliance repair provider in your area. Tell them your Installation Test numbers or code, whether the vent is clean, and your model number.

4. An electrician. For nP or PS codes that don't clear after a breaker reset.

Questions to ask any technician:

• Did you run LG's Installation Test, and what were the readings?
• Did you check airflow at the outside hood before quoting a part?
• Is it the element, sensor, thermistor, or thermostat? How did you confirm it?
• 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: plans often exclude vent cleaning and problems caused by venting, and a dryer that's already failing is usually not covered.

FAQ

Why is my LG dryer taking so long to dry?
LG says it's most likely blocked airflow: lint on the filter or an obstruction in the duct. Also check that Energy Saver is off, the drum is only about half full, and you're using Time Dry for small or mixed loads.

What do d80, d90, and d95 mean on an LG dryer?
Airflow is restricted between the dryer and the outside exhaust. Clean the lint tray, reduce the load, straighten the duct, check the outside flaps, and call a dryer duct cleaner if the code stays.

Why does LG's Energy Saver make drying take longer?
LG says Energy Saver is on by default for Cotton/Normal and air-dries without heat for most of the cycle, so it runs longer but uses less electricity or gas.

What does HS mean on an LG dryer?
A humidity-sensor error. LG says it makes the dryer run for 2½ hours. Clean the sensors below the lint filter, let them dry, and request service if it continues.

How do I run the LG dryer Installation Test?
With the dryer cool and empty, press Power, then immediately hold your model's two test buttons (for example Temp and Signal) until the display shows InS, then press Start/Pause. Numbers that stay flat point to a heating problem; a 2–9 rise or d-codes point to the vent.

How often should I clean my LG dryer vent?
LG recommends professional vent cleaning once a year, cleaning the lint filter before every load, and wiping the sensor bars once a month.

How much does it cost to fix an LG dryer that takes too long?
Often only a vent cleaning, which HomeGuide puts at $80 to $185. When we checked Sears PartsDirect on 2026-10-30, LG moisture sensor bars were listed at about $17 to $20 and heating elements at about $236 to $303.

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 gas, wiring, or mains power, call a qualified pro.
Last updated: 2026-10-30.

Sources

1. LG USA Support: "LG Dryer – Why is My Dryer Not Heating, Not Drying or Taking a Long Time Drying?" (updated 09/10/2026; airflow blockage as the likely cause; Installation Test preparation, button chart, InS, START/PAUSE, readings, End or 0; scenarios: nP / H5 / d80 / d85 / d90 / d95 / Flow Sense, numbers flat or up and down = heating system repair, rise of 2–9 = restricted airflow, rise of 10+ = settings; clean inside, behind (not crushed, straight or S-curve, rigid or semi-rigid), outside (Air Dry, flappers open); vent specialist for in-wall ducts, length and 90° angles; Energy Saver default on Cotton/Normal, air dries without heat most of the cycle, off for one cycle or hold 3 seconds; sensors stop the load regardless of the estimated time; Dryness Level default 80% or Normal; Manual or Time Dry for small loads, sheets, bulky items, mixed loads; clean the humidity sensor monthly, 4–5 wipes; professional vent cleaning yearly; 24/7 Chat Support). https://www.lg.com/us/support/help-library/lg-dryer-why-is-my-dryer-not-heating-not-drying-or-taking-a-long-time-drying--1432223739634 (accessed 2026-10-30)
2. LG USA Support: "LG Dryer - Error Code List(New)" (updated 08/13/2025; d80 / d90 / d95 steps incl. reduce load size, duct not coiled, flaps, duct cleaner reporting length and 90° angles; HS runs 2½ hours, clean sensors below the lint filter; nP, 240 V, breaker off at least 10 seconds, licensed electrician; PS reversed wires; tE reset by holding START/PAUSE 5 seconds; tE2 cold conditions and steam; gAS; EHE; guide covers all models). https://www.lg.com/us/support/help-library/lg-dryer-error-code-list--20154710772482 (accessed 2026-10-30)
3. LG USA Support: "[LG Dryer] [Electric] Laundry is not drying well" (updated 09/15/2025; only spun laundry; clean the lint filter each time; Clean Filter light and heat exchanger on models that have one; fill about halfway; too small a load stops after about 10 minutes in automatic mode; separate thick and thin; when adding laundry, Manual or Time Dry for 30 minutes; professional inspection). https://www.lg.com/us/support/help-library/lg-dryer-electric-laundry-is-not-drying-well--20154774023740 (accessed 2026-10-30)
4. LG USA Support: "[LG Dryer drying time] The drying time is extended" (dirty humidity sensor or clogged filter; mixed thick and thin laundry; wrong cycle; too much moisture; opening the door or pausing lowers the temperature and can add up to an hour; low ambient temperature in winter lengthens preheating). https://www.lg.com/us/support/help-library/lg-dryer-drying-time-the-drying-time-is-extended--20154713319388 (accessed 2026-10-30)
5. LG USA Support: "LG Dryer – How to Perform Dryer Maintenance" (clean the lint filter after every load, water OK if dried completely; ducts cleaned annually; moisture sensor behind the lint filter, wipe often) and "LG Dryer - How to Clean the Humidity Sensor" (dirty sensor can increase or decrease drying time). https://www.lg.com/us/support/help-library/lg-dryer-how-to-perform-dryer-maintenance--1428690638456 · https://www.lg.com/us/support/help-library/lg-dryer-how-to-clean-the-humidity-sensor--20153089283667 (accessed 2026-10-30)
6. LG US 2026 dryer limited warranty (PDF): 1-year parts and labor; drum 3 years part only; Direct Drive / inverter motor parts 10 years on eligible models; exclusions incl. improper installation and inadequate supply of air. https://www.lg.com/us/PDF/warranty/ha/2026_LG_Dryer_Limited_Warranty_Warranty_Card.pdf (accessed 2026-10-25; the PDF did not download for a re-check on 2026-10-30)
7. LG US: warranty information and repair scheduling. https://www.lg.com/us/support/warranty · https://www.lg.com/us/support/repair-service/schedule-repair
8. US Fire Administration: "Clothes Dryer Fires in Residential Buildings (2008–2010)," Topical Fire Report Series Vol. 13, Issue 7 (2,900 fires a year; failure to clean 34%). https://www.usfa.fema.gov/downloads/pdf/statistics/v13i7.pdf
9. U.S. Consumer Product Safety Commission: recalls search. https://www.cpsc.gov/Recalls (accessed 2026-10-30)
10. Federal Trade Commission: endorsement and affiliate disclosure guidance. https://www.ftc.gov/business-guidance/resources/ftcs-endorsement-guides-what-people-are-asking
11. Part prices: Sears PartsDirect public search pages, see S-list below (accessed 2026-10-30).
12. 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; prices change, confirm with your model number):

• S1. Search "lg dryer lint filter": LG lint screens ADQ56656403 $56.62, 5231EL1003B $57.70 (housing 4974EL1003B $35.86 listed separately; GE, Whirlpool, Samsung, Frigidaire, and other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dryer%20lint%20filter
• S2. Search "lg dryer moisture sensor": sensor bars EBD50964602 $16.87, 6500EL3001A $20.35; grilles MCK48435501 $24.50, 4930EL2003B $25.23; harness 6631EL3003B $24.47 (other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dryer%20moisture%20sensor
• S3. Search "lg dryer heating element": 5301EL1001J $236.31, AEG57816501 $242.22, 5301EL1001H $302.57 (Kenmore Elite-labeled 5301EL1001A, washer-dryer combo 5301FR2076G, and other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dryer%20heating%20element
• S4. Searches "lg dryer thermistor" and "lg dryer cycling thermostat": thermistor 6323EL2001C $36.78; thermostat and thermistor kit AGM30045804 $113.72; high-limit thermostats 6931EL3003D $18.24, 6931EL3001F $57.70; blower thermostat 6931EL3002M $53.12; operating thermostat 6931EL3001D $76.11 (Kenmore Elite-labeled, washer-dryer combo, and other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dryer%20thermistor · https://www.searspartsdirect.com/search?q=lg%20dryer%20cycling%20thermostat
• S5. Search "lg dryer blower wheel": MER48344701 $34.82, 5835EL1002A $92.82 (retainer and other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dryer%20blower%20wheel
• S6. Searches "lg dryer igniter" and "lg dryer gas valve coil": LG igniter 5318EL3001A $134.64; LG gas valve AGM30063309 $283.06 (separate LG valve coils not listed; other brands excluded). https://www.searspartsdirect.com/search?q=lg%20dryer%20igniter · https://www.searspartsdirect.com/search?q=lg%20dryer%20gas%20valve%20coil

Pro-cost guide sources [GUIDE] (US national averages, parts + labor, not brand-specific quotes unless noted; the guide pages carry 2024–2025 dates, so local quotes may differ):

• G1. Fixr, "How much does it cost to repair a dryer?" (updated January 31, 2025): heating element replacement $150–$350; thermostat replacement $100–$260; igniter $100–$250; filter replacement $50–$75; vent replacement $75–$150; brand table: LG $50–$450; service fee $50–$80, labor $50–$100 per hour; dryers last 8–12 years; new dryer $600–$1,500. https://www.fixr.com/costs/dryer-repair (accessed 2026-10-30)
• G2. HomeGuide, "How Much Does Dryer Repair Cost? (2026)" (byline November 14, 2024): heating element $150–$350; thermostat $100–$300; igniter $100–$250; clogged vent cleaning $80–$185; vent replacement $100–$300; new vent through an exterior wall $200–$800; minimum service fee $70–$130, $50–$125 per hour; new dryer $800–$1,200 (unit); dryers last 8–13 years on average. https://homeguide.com/costs/dryer-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", "Flow Sense", and "WashTower" are trademarks of their owners and are used here only to describe the products we cover.

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• Prices are estimates and change often. Always get a written quote.
• Safety: Unplug appliances before working on them. Electric dryers use 240 V. Gas appliance repairs should be done by a qualified technician. If you smell gas, leave and call your gas utility. If you're unsure, call a qualified professional.

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