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The back of a home laundry pair pulled out from the wall, a short length of rigid metal exhaust duct from the dryer to the wall outlet with a little gray lint at the joint, the dryer unplugged and nobody in the frame.

LG laundry unit — d90 exhaust restricted

LG's own support article says the duct blockage sensor built into the dryer warns of a potential blocked exhaust duct, and a d90 error means it has detected about 90% blockage in the duct work.

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Mon–Sat, 8am–8pm

  • Vents and airflow
  • Lint path and exhaust vent cleaning
  • Source: LG

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or call (844) 879-5178

What d90
actually means.

LG's own support article says the duct blockage sensor built into the dryer warns of a potential blocked exhaust duct, and a d90 error means it has detected about 90% blockage in the duct work.

LG home appliance display

What to do when d90 shows on the home appliance

Kind of codeVents and airflow

Air is not moving the way the appliance expects. On a dryer that usually means lint in the screen housing, a crushed transition duct or an exhaust run packed along its length, and some makers measure it and show a code for a restricted vent before drying slows badly. On cold storage it can mean a condenser coil buried in dust or a grille blocked by a rug. Clean the screen, check the duct behind the machine with it unplugged, and book the full run cleaned; a hot or scorched smell means stop now.

Usually leads toLint path and exhaust vent cleaning

Lint cleared from the screen housing, the duct behind the laundry and the whole run to the outside hood.

Shows up asLaundry Taking Two Cycles to Dry: The Lint Path Is Usually Why

Laundry taking two cycles to dry is a load that comes out damp at the end of a normal cycle and needs another run, often with a hotter cabinet and a muggier laundry room.

MakeLG

LG dryers can warn you about a restricted exhaust before drying slows, and LG washers ask for a tub clean; a visit acts on both and checks the refrigerator's filter and coil.

SourceLG USA Support — Laundry Dryer: Understanding d90 and d95 Error Codes

Applies to LG dryers equipped with the duct blockage sensor; the related d95 code reports a more severe blockage from the same sensor.

Before you book,
in this order.

Each step comes from LG's own guidance for d90 on its home appliances. Follow it to the end: the last card says whether this is a visit.

01

Make sure the lint filter is clean and free of blockages before checking anything else.

02

Check the outside dryer vent hood for airflow while the dryer runs; weak or no airflow points to a restriction.

03

With the dryer unplugged, disconnect the vent and look for visible obstructions, then remove and reconnect.

04

If the ductwork itself is too long or has too many bends, have a professional perform a duct cleaning rather than continuing to run the dryer.

Still there?

It usually turns into lint path and exhaust vent cleaning. Book with the code and the model number.

What not to do

d90 is a duct-blockage warning, not a heating-element or motor failure; the fix is clearing the exhaust path, and LG warns against continuing to use the dryer with a severely restricted exhaust until it's cleared.

What you may
notice with it.

The home appliance problems d90 tends to arrive with. Answer these at the home appliance before anyone is booked.

All problems

Before you call

Laundry Taking Two Cycles to Dry: The Lint Path Is Usually Why

All 6 causes, cheapest first

It also comes with

A home laundry room with a front-loading vented machine standing open after a finished cycle, a pile of towels in a basket in front of it visibly still damp and heavy, a lint screen held out of its slot and covered with a thick gray layer resting on the machine's top, soft daylight. Problem

Laundry Taking Two Cycles to Dry: The Lint Path Is Usually Why

6 causes, cheapest first

Where d90 usually leads

Lint path and exhaust vent cleaning.

Lint path cleaned from the screen housing through the transition duct and wall run to the outside hood · low to moderate.
Book a visit What the job involves

LG
home appliances.

LG dryers can warn you about a restricted exhaust before drying slows, and LG washers ask for a tub clean; a visit acts on both and checks the refrigerator's filter and coil.

LG home appliance maintenance

More LG codes

tCLDrain pump filter cleaningClean the dishwasher filterFresh Air Filter replacement

Vents and airflow on other makes

Electrolux EF1Fisher & Paykel cLn condGE Profile 353Maytag AFMiele F60Monogram Air-cooled condenser cleaningWhirlpool AF
All 9 codes of this kind
A tidy home kitchen with a tall built-in stainless column refrigerator and freezer pair set into light wood cabinetry, the toe grille at floor level removed and leaning against the cabinet, a technician seen only from the shoulders down kneeling on a gray mat and drawing a long soft coil brush out from under the unit, a small canister vacuum beside him, even daylight from a side window. LG builds this

Cold storage

Upkeep for everything in the house that keeps things cold: refrigerators, freezers, wine and beverage units and ice makers, cleaned and checked before they start struggling.

 A home kitchen with a stainless pro-style gas range and a matching hood above it against a light tile backsplash, the grates lifted off and laid on a folded towel on the counter, a technician seen only from the shoulders down wiping a brass burner cap with a soft cloth, a clean baffle filter leaning beside the towel, all burners off, soft daylight. LG builds this

Cooking appliances

Upkeep for ovens, ranges, cooktops, hoods, microwaves, steam and speed ovens: burners and igniters cleaned, gas joints checked, grease filters and descaling done on time.

 An open built-in dishwasher in a bright home kitchen with white cabinets, both racks pulled out and empty, the cylindrical filter lifted out and held over a stainless sink by a technician seen only from the shoulders down, a lower spray arm resting on a folded towel on the counter, soft daylight. LG builds this

Dish care

Upkeep for dishwashers and disposers: filters rinsed, spray arms cleared, the door seal and drain loop checked, and hard-water scale kept off the parts that heat and spray.

In LG's own words

If you see a d90 or d95 error on your control panel, your dryer has detected a 90% or 95% blockage in the duct work, prompting immediate attention.
LG USA Support — Laundry Dryer: Understanding d90 and d95 Error Codes

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Applies to LG dryers equipped with the duct blockage sensor; the related d95 code reports a more severe blockage from the same sensor.

LG d90 home appliance maintenance,
where we come out.

The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.

All service areas

Tampa BayFL · 31 areas

OrlandoFL · 30 areas

Miami / South FloridaFL · 47 areas

New York MetroNY · 75 areas

HoustonTX · 36 areas

ChicagoIL · 50 areas

Los AngelesCA · 95 areas

San DiegoCA · 31 areas

San Francisco Bay AreaCA · 74 areas

A family sharing breakfast in a bright, well-kept home kitchen.
For the heart of your home.

Questions
about d90.

Can I clear d90 myself?
Make sure the lint filter is clean and free of blockages before checking anything else. If it comes back, it needs a visit.
What's the difference between d90 and d95?
Both come from the same duct blockage sensor; d90 reports about 90% restriction and d95 about 95% or more, with d95 treated as the more urgent of the two.
Do I need a professional to clear a d90 code?
Not always — LG's guide starts with checking the lint filter and the outside vent hood yourself; a professional duct cleaning is recommended only if the ductwork's length or bends are the underlying cause.
Is it safe to keep using the laundry unit with a d90 code showing?
LG specifically warns that a severely restricted exhaust can create an unsafe environment, so the dryer shouldn't be used again until the blockage is cleared.

Back to your everyday

Still showing d90?

A booking goes further when it has the reminder or code as shown, the model number from the rating plate, and a word on when that filter, screen or tub was last cleaned. With those three, the office can pack the right filter or cleaner for your appliance.

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(844) 879-5178 Schedule maintenance