Error code · Dryer

Samsung Dryer Code C90 / C9: Vent Over 90% Clogged

C90 or C9 is a result from the Vent Blockage test on Samsung dryers with a digital display. It reports that over 90 percent of the vent is clogged, which is close to a full stop…

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Code: C90 / C9
Appliance: Dryer
Brand: Samsung
Warranty: 30-day workmanship

What C90 / C9 means

C90 or C9 is a result from the Vent Blockage test on Samsung dryers with a digital display. It reports that over 90 percent of the vent is clogged, which is close to a full stop of airflow. The dryer will struggle to dry anything and runs hot while it tries. You will see C90 or C9 when the test finishes, and cycles may already be taking much longer than normal.

Common causes of C90 / C9

A vent duct nearly packed with lint
A flattened or disconnected vent hose behind the dryer
A lint filter that is heavily clogged
An outside hood that is stuck shut or covered

✓ One safe check you can try

1. Stop using the dryer and unplug it. 2. Remove the lint filter and clean it, along with its housing. 3. Pull the dryer out and take the vent hose off the back. Clear lint from the hose and the wall duct opening. 4. Go outside and clear the vent hood. 5. Reconnect the duct without kinks and run the test again.

! Why to stop there

A nearly blocked vent can hide a long run of lint we cannot see from the dryer, so we check airflow along the whole route.
Once the vent is clear, we confirm the dryer has not been damaged by heat.
We give you a written price before work and a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Dryer codes

AE3 / AE4 / AE5 / E3Samsung Dryer Code AE3 / AE4 / AE5 / E3: Control Communication Error tE3 / tC5 / tCS / 1 tC / 1tC5 / 1tCSSamsung Dryer Code tE3 / tC5 / tCS / 1 tC / 1tC5 / 1tCS: Heat Sensor Reading 9E1Samsung Dryer Code 9E1: Supply Voltage Problem bC2 / 6E2 / 6C2Samsung Dryer Code bC2 / 6E2 / 6C2: Stuck Control Button d0 / 1 DC / 1 dFSamsung Dryer Code d0 / 1 DC / 1 dF: Door Not Registering Closed 1 HC / 1 FC / 1 ACSamsung Dryer Code 1 HC / 1 FC / 1 AC: Prefix Variants Extra Low and 20 min lights blinkingSamsung Dryer Extra Low and 20 min Lights: Power Frequency FC / FESamsung Dryer Code FC / FE: Invalid Frequency

C90 / C9C90 / C9 questions

How serious is C90 on a Samsung dryer?

More serious than C80. Over 90 percent of the vent is blocked, so the dryer runs hot and dries poorly. Clean the vent before using the dryer again.

Do C9 and C90 differ?

Yes. They are two spellings of the same over-90-percent result, and which one appears depends on the display on your model. The checks and the cleaning are the same either way.

How often should I clean the vent?

We suggest checking the lint filter every load and having the full duct cleaned if drying times grow long. A blocked duct is the usual reason for this code.

Book a visit

Still seeing C90 / C9?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 561-5298