Samsung Dryer Error C90

⚡ Quick Answer: The Samsung dryer error C90 indicates a significant vent blockage, typically around 90%. This malfunction can lead to poor drying performance, extende... ✅ DIY Fixable

What Does Error C90 Mean?

The Samsung dryer error C90 indicates a significant vent blockage, typically around 90%. This malfunction can lead to poor drying performance, extended drying times, and potential overheating due to restricted airflow. To resolve this issue, ensure that the dryer vent and lint filter are clean and unobstructed. Running the vent blockage test can help confirm airflow improvements after cleaning.

Common Symptoms:

  • Dryer displays C90 during/after vent blockage test
  • Poor drying performance due to restricted airflow
  • Possible overheating or long dry times due to restricted exhaust

Possible Causes

  • Significant vent/exhaust blockage (high)
  • Vent sensor or pressure sensor fault (when no physical blockage detected) (medium)

How to Fix Error C90

DIY Fix Check and clean dryer vent and lint filter

  1. Turn off and unplug the dryer
  2. Remove and clean the lint filter
  3. Disconnect exhaust vent hose and clean inside hose and wall duct
  4. Ensure unobstructed airflow through venting system
  5. Reassemble and rerun the dryer

DIY Fix Run the vent blockage test

  1. Follow manufacturer’s instructions to perform the vent blockage test
  2. Ensure the dryer door is closed, and interior is empty when running the test
  3. Observe airflow readings or codes to verify improvement after cleaning

Technician Only Inspect vent pressure/airflow sensors

  1. Disconnect power supply
  2. Access vent pressure switch and airflow sensor components
  3. Check for loose connections, damage, or contamination
  4. Test sensors with appropriate diagnostic tools and replace if faulty

Parts needed: vent pressure switch, airflow sensor

🛑 When to Call a Pro:
  • Vent cleaning does not clear the error
  • Sensors tested and still failing
  • Unusual noises or overheating persists after cleaning

Technical Specifications

wattage 5400W
component Heating Element
resistance 10-30 ohms
part_number DC47-00019A
voltage_rating 240V AC

Common Questions

What does C90 error mean on samsung dryer?

C90 indicates a significant vent blockage, affecting drying performance and airflow.

Can I fix samsung dryer C90 error myself?

Yes, you can clean the vent and lint filter, and run the vent blockage test.

How much does it cost to fix C90 error?

Estimated repair costs for the C90 error range from $50 to $200.

When should I call a technician for C90?

Call a technician if cleaning does not resolve the error or if sensors are failing.

Sources & References

Data last verified: 2026-01-10

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