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Error code · Washer-Dryer Combo

Samsung Laundry Combo Code ULC: Foam During Dehumidification

On the Samsung WD53DBA900H-series Bespoke AI Laundry Combo, such as the WD53DBA900HZA1, ULC means foam was detected during the dehumidification course. The unit asks you to remove the foam and run the dehumidification course again. It…

Low risk · DIY check OK
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Code
ULC
Appliance
Washer-Dryer Combo
Brand
Samsung
Warranty
30-day workmanship

What ULC means

On the Samsung WD53DBA900H-series Bespoke AI Laundry Combo, such as the WD53DBA900HZA1, ULC means foam was detected during the dehumidification course. The unit asks you to remove the foam and run the dehumidification course again. It is a warning about suds in the drum, often from too much detergent in the load. You will see ULC on the display and the course stops.

Common causes of ULC

  • Too much detergent left in the laundry
  • Foam sensing working as designed
  • Insufficient rinsing of the load
✓ One safe check you can try

1. Stop the course and open the door when it is safe. 2. Remove the foam you can reach with a clean towel. 3. Run a rinse before starting the dehumidification course again. 4. Use less detergent in future loads. 5. If ULC repeats with a clean, well-rinsed load, call us.

! Why to stop there
  • If ULC returns with a well-rinsed load, we cannot tell whether the foam sensor or the rinse circuit is behind it.
  • We check the sensor reading and water flow before recommending a part.
  • A written estimate is yours before we start, and our repair is warranted for 30 days.
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 Washer-Dryer Combo codes

DC1Samsung Laundry Combo Code DC1: Door Lock and Unlock UBSamsung Laundry Combo Code UB: Load Out of Balance dC2Samsung Laundry Combo Code dC2: Door Pulled While Locked UB1Samsung Laundry Combo Code UB1: Waterproof Items in the Drum DC5Samsung Laundry Combo Code DC5: Auto-open Door Did not Open DC6Samsung Laundry Combo Code DC6: Auto Open Door and SmartThings HCSamsung Laundry Combo Code HC: Heater Error or Hot Compressor LCSamsung Laundry Combo Code LC: Leak Detected
ULCULC questions
How is ULC related to SUD?

They are related. SUD shows foam detected during washing. ULC shows foam during the dehumidification course and asks you to remove it and run the course again.

How do I remove the foam?

Wipe out what you can reach, then run a rinse. Do not open the door while there is water in the drum. A couple of extra rinses before drying will carry the remaining detergent away.

Will ULC come back?

Not if the laundry is rinsed well and less detergent is used. If it repeats, we inspect the sensor. A well-rinsed load and a measured amount of detergent are the best prevention for later cycles.

Book a visit

Still unsure about ULC?

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

(713) 561-5298