--- title: "Samsung C90 — a graded vent blockage reading on a new hookup" description: "What C90 means on Samsung C90 — a graded vent blockage reading on a new hookups, what to check before booking, and when it is not a failure at all." url: "https://applianceinstallation.center/error-codes/samsung-c90/" --- # Samsung C90 — a graded vent blockage reading on a new hookup Samsung's own vent blockage test returns a graded result rather than a flat pass or fail: a code like C8 or C80 means about 80 percent clogged, and a code like C90 or C9 means about 90 percent clogged, both meaning the duct system cannot exhaust properly. ## What C90 actually means. Samsung's own vent blockage test returns a graded result rather than a flat pass or fail: a code like C8 or C80 means about 80 percent clogged, and a code like C90 or C9 means about 90 percent clogged, both meaning the duct system cannot exhaust properly. Samsung appliance display · also shown as C9, C80, C8 What to do when C90 shows on the appliance ### Kind of code Vents and ducting A restricted-exhaust message on one of the first loads means the new dryer is pushing against its duct. The cause is almost always the install: a run longer than the maker's table allows for its number of elbows, a transition duct crushed flat when the machine was pushed to the wall, a duct pulled off its collar, or a wall cap whose flap cannot open. Stop the cycle, unplug, and have the run shortened, straightened and reconnected before the next load. ### Usually leads to Laundry exhaust run installation A metal exhaust path from a new dryer to the outdoors: short transition, taped joints, a working hood. ### Shows up as Laundry Exhaust Crushed, Loose or Blowing Into the Room A laundry exhaust disconnected, crushed or venting into the room means a new vented dryer is blowing hot, damp, lint-heavy air behind the machine instead of outdoors. ### Make Samsung Samsung installs cover refrigerators with ice and water, slide-in ranges, dishwashers and laundry pairs, often joined to a home network at first power-on. ### Source Samsung support — Run a Vent Blockage test on your Samsung dryer Samsung documents this graded C8/C80/C90-family result as part of a dedicated vent blockage test built into its current laundry control platform. ## Before you book, in this order. Each step comes from Samsung's own guidance for C90 on its appliances. Follow it to the end: the last card says whether this is a visit. 01 Run Samsung's documented vent blockage test rather than judging the duct only by how the machine dries. 02 Confirm the duct run uses rigid or semi-rigid material rather than crushed flexible duct behind the unit. 03 Clean the full exhaust run, including the outside vent hood, and re-run the test. 04 If a graded result of 80 percent or higher persists after cleaning, book a visit to check the duct sizing and length rather than repeating the test. ### Still there? It usually turns into [laundry exhaust run installation](https://applianceinstallation.center/services/laundry-exhaust-run-installation/). Book with the code and the model number. ### What not to do A high graded result does not mean the heating element or the drum motor has failed. Samsung ties this reading specifically to the exhaust duct outside the cabinet, not to anything inside the unit. ## What you may notice with it. The appliance problems C90 tends to arrive with. Answer these at the appliance before anyone is booked. [All problems](https://applianceinstallation.center/problems/) Before you call ### [Laundry Exhaust Crushed, Loose or Blowing Into the Room](https://applianceinstallation.center/problems/laundry-exhaust-disconnected/) [All 6 causes, cheapest first](https://applianceinstallation.center/problems/laundry-exhaust-disconnected/) It also comes with - [**Hood Not Drawing Smoke: Duct Size, Damper and Makeup Air**](https://applianceinstallation.center/problems/hood-not-drawing-smoke/) - [**Appliance Installation Code on a New Unit: Setup Modes and Hookup Messages**](https://applianceinstallation.center/problems/appliance-installation-code/) Hazard after a hookup ### Laundry Exhaust Crushed, Loose or Blowing Into the Room 6 causes, cheapest first Where C90 usually leads ## Laundry exhaust run installation. **Metal exhaust transition and reachable wall run fitted from a new dryer to the outside hood, joints taped, airflow confirmed · moderate.** Book a visit [What the job involves](https://applianceinstallation.center/services/laundry-exhaust-run-installation/) ## Samsung appliances. Samsung installs cover refrigerators with ice and water, slide-in ranges, dishwashers and laundry pairs, often joined to a home network at first power-on. [Samsung appliance installation](https://applianceinstallation.center/brands/samsung/) More Samsung codes [4E](https://applianceinstallation.center/error-codes/samsung-4e/) [5E](https://applianceinstallation.center/error-codes/samsung-5e/) [UE](https://applianceinstallation.center/error-codes/samsung-ue/) [Cb](https://applianceinstallation.center/error-codes/samsung-cb/) Vents and ducting on other makes [Electrolux EF1](https://applianceinstallation.center/error-codes/electrolux-ef1-known-installation-issue/) [GE Profile Check Vent / Vent Blocked](https://applianceinstallation.center/error-codes/ge-profile-vent-blocked/) [LG d90](https://applianceinstallation.center/error-codes/lg-d90/) Samsung builds this ### Cold storage Setting a new refrigerator, freezer, wine or beverage unit or ice maker into its opening: measured, connected to water, leveled and started. Samsung builds this ### Cooking appliances Hooking up ranges, cooktops, wall ovens, microwaves and hoods: gas connectors leak-tested, anti-tip brackets fastened, ducts sized and the first light checked. Samsung builds this ### Dish care Fitting a new dishwasher or dish drawer under the counter: supply line, drain loop or air gap, power, mounting brackets and a first test cycle. ## In Samsung's own words > a code like C8 or C80 indicates about 80% clogged, and a code like C90 or C9 indicates about 90% clogged. [Samsung support — Run a Vent Blockage test on your Samsung dryer](https://www.samsung.com/us/support/answer/ANS10004809/) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Samsung documents this graded C8/C80/C90-family result as part of a dedicated vent blockage test built into its current laundry control platform. ## Samsung C90 appliance installation, 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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Run Samsung's documented vent blockage test rather than judging the duct only by how the machine dries. If it comes back, it needs a visit. ### Can a new laundry hookup already show a high graded blockage reading? Yes, a duct run that is too long, has too many turns, or uses crushed flexible material can read as heavily restricted the very first time the test is run, regardless of how new the installation is. ### Is a result like C80 something to fix immediately or something to watch? Samsung's own scale treats 80 percent and above as restricted enough to affect performance, so cleaning and re-checking the run before the next several loads is the documented approach rather than waiting. ### Does the vent blockage test check the machine's own lint filter as well as the duct? The test is aimed at the exhaust duct itself; the lint filter is a separate, simpler check that should be done first since a clogged filter can also affect the same readings. --- **[Read on the site: Samsung C90 — a graded vent blockage reading on a new hookup](https://applianceinstallation.center/error-codes/samsung-c90/)** **[Book a visit with ApplianceInstallation.center](https://applianceinstallation.center/schedule/)**