--- title: "LG laundry unit — d90 exhaust restricted" description: "What d90 means on LG laundry unit — d90 exhaust restricteds, what to check before booking, and when it is not a failure at all." url: "https://appliancemaintenance.center/error-codes/lg-dryer-d90/" --- # 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. ## 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 code Vents 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 to Lint 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 as Laundry 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. ### Make LG 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. ### Source LG 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](https://appliancemaintenance.center/services/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](https://appliancemaintenance.center/problems/) Before you call ### [Laundry Taking Two Cycles to Dry: The Lint Path Is Usually Why](https://appliancemaintenance.center/problems/laundry-taking-two-cycles-to-dry/) [All 6 causes, cheapest first](https://appliancemaintenance.center/problems/laundry-taking-two-cycles-to-dry/) It also comes with - [**Hot or Burning Lint Smell in the Laundry Room: Stop the Cycle**](https://appliancemaintenance.center/problems/laundry-lint-burning-smell/) - [**Appliance Maintenance Code or Reminder Light: Filter, Descale, Vent Check**](https://appliancemaintenance.center/problems/appliance-maintenance-code/) 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](https://appliancemaintenance.center/services/lint-path-and-exhaust-vent-cleaning/) ## 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](https://appliancemaintenance.center/brands/lg/) More LG codes [tCL](https://appliancemaintenance.center/error-codes/lg-washer-tcl/) [Drain pump filter cleaning](https://appliancemaintenance.center/error-codes/lg-washer-drain-pump-filter/) [Clean the dishwasher filter](https://appliancemaintenance.center/error-codes/lg-dishwasher-filter-clean/) [Fresh Air Filter replacement](https://appliancemaintenance.center/error-codes/lg-refrigerator-fresh-air-filter/) Vents and airflow on other makes [Electrolux EF1](https://appliancemaintenance.center/error-codes/electrolux-ef1-ventilation-blockage/) [Fisher & Paykel cLn cond](https://appliancemaintenance.center/error-codes/fisher-and-paykel-dryer-cln-cond/) [GE Profile 353](https://appliancemaintenance.center/error-codes/ge-profile-dryer-code-353/) [Maytag AF](https://appliancemaintenance.center/error-codes/maytag-af-check-vent/) [Miele F60](https://appliancemaintenance.center/error-codes/miele-f60/) [Monogram Air-cooled condenser cleaning](https://appliancemaintenance.center/error-codes/monogram-condenser-cleaning/) [Whirlpool AF](https://appliancemaintenance.center/error-codes/whirlpool-af-check-vent/) [All 9 codes of this kind](https://appliancemaintenance.center/error-codes/#family-airflow) 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. 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. 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](https://web.archive.org/web/20210528063727/https://www.lg.com/us/support/help-library/laundry-dryer-understanding-d90-and-d95-error-codes-CT10000011-20150209089448) 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. 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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. --- **[Read on the site: LG laundry unit — d90 exhaust restricted](https://appliancemaintenance.center/error-codes/lg-dryer-d90/)** **[Book a visit with ApplianceMaintenance.center](https://appliancemaintenance.center/schedule/)**