Mon-Fri 9am-5pm local timeA referral service: we connect you with independent repair companies near you
Appliance Guidebook
(888) 280-5160
  1. Home
  2. Samsung
  3. Washer
  4. SUD

Samsung washer SUD code: what it means and how to clear it

Your Samsung washer may stop mid-cycle, flash SUD or SUDS, then sit there while the door stays locked. This page shows what to try first, what the small drain filter has to do with it, and when the fault points to a failed part.

Call to be connected(888) 280-5160

A person answers Mon-Fri 9am-5pm local time. Outside those hours, leave a message and a company near you calls back.

Answered by an independent appliance repair company that serves your area. Not a call center.

Straight answer

The samsung washer sud code means the washer detected too many suds or a suds-lock condition during the wash or rinse part of the cycle. The most common cause is too much detergent or detergent that isn't marked HE for a high-efficiency washer.

Check these first

Safe to do yourself. Unplug the appliance before you start.

  1. Let the suds settle, then reset power

    Pause the washer, power it off, then unplug it for a few minutes. If the washer is stuck on SUD after the foam is gone, a power reset can clear the display so you can start a rinse or drain cycle.

  2. Run rinse and spin with no detergent

    Take the laundry out if the door unlocks, then run Rinse and Spin with no soap or softener. Repeat if you still see foam in the drum or in the door glass.

  3. Check the detergent bottle

    Use only HE detergent, then cut the amount way back for normal loads. Front-load Samsung washers use little water, so a cap filled like an older washer can leave residue and keep calling for extra rinses.

  4. Clean the front drain pump filter

    Unplug the washer. Open the small lower front access door, drain water through the little hose into a shallow pan, then twist out the filter and remove lint, coins, hair, cloth pieces, or color-catcher sheets. On many Samsung front loaders, that filter knob has to be pushed inward while turning or it just clicks.

  5. Run an empty hot wash

    After the filter is clean, run an empty hot cycle or self-clean cycle with no additives. This helps rinse old detergent film from the tub, boot, and sump area.

When it's a repair

If the code returns with HE detergent, no visible foam, and a clean filter, a technician usually checks the drain system first, then the pressure switch or water-level sensor parts. The likely repair order is a damaged drain pump filter cap or filter body, weak drain pump, plugged pressure hose, failed pressure switch, then a control board only after the inputs test correctly. If it's an older entry-level front loader with several faults, tub noise, or corrosion around the cabinet base, putting major parts into it may not make sense.

Models where this shows up most

Samsung front-load models commonly show SUD as SUD, 5UD, SUd, Sd, 5d, SUdS, or 5Ud5 because the display characters can look alike. WF45T6000A and WF45T6000AV owners have reported the code staying on after clean cycles, even when the filter wasn't packed with debris.

Worth knowing

Conditions that make this more likely

The house drain can be the real problem

Older homes often have narrow or partly blocked standpipes and drain lines. If the machine's own filter and hose are clear, the house drain is the next suspect, and that's a plumbing call rather than an appliance call.

Boards fail earlier in hot rooms

Electronics are rated for room temperature. In a garage or an unconditioned laundry room in summer, a control board can sit well above that for hours a day. Before replacing a board, a good technician confirms the parts it controls test good, since a shorted pump or valve can take out a new board too.

What a technician tests

Most likely part first. These are for a technician with a meter and the tech sheet, not a weekend project.

PartHow it's tested
Drain pump filter and pump sumpDrain the machine through the service hose, remove the filter, and inspect the filter cup and sump for lint mats, coins, fabric strips, hair pins, or sheets that block flow. A cracked filter cap, torn seal, or debris behind the filter can leave soapy water in the sump and bring the SUD message back.
Drain pumpRun Drain or Spin in service mode or a normal drain step and listen for a steady pump sound with strong discharge at the standpipe. A pump that hums, rattles, starts only sometimes, or can't lift water through the drain hose after the filter is clear is suspect.
Pressure switch or water-level sensorInspect the small air tube for detergent sludge, kinks, or water trapped in the line. With power removed, the switch can be checked for continuity at the proper terminals on models that use a switch style sensor, where a good closed contact may read 0 ohms or beep on a meter.
Drain hose and standpipe pathCheck for a kinked hose, a clogged hose run, or a standpipe issue that slows the drain. Slow draining can hold soapy water in the tub, causing extra rinse attempts and a repeated suds code.
Main control boardOnly move here after the drain pump, pressure system, wiring plugs, and detergent use check out. A bad board is more likely when the washer misreads inputs or keeps the SUD routine active even after the pressure signal and drain action test normally.

Don't see your symptom?

Describe it on the phone. The company on the other end works on these every day and will know what to ask.

Call to be connected(888) 280-5160

Other Samsung washer problems

4E4E code on Samsung washer: what it means and how to fix it

A 4E code on a Samsung washer means the washer isn't sensing enough water coming in during fill, and newer displays may…

Read the fix →

DCSamsung washer dC code: what it means and what to check

The Samsung washer dC code means the washer either detected an unbalanced load or could not confirm the door or lid was…

Read the fix →

Samsung washer not draining: what it means and what to check

A Samsung washer not draining means the control can't confirm that water is leaving the tub fast enough. The single most…

Read the fix →

Samsung washer not spinning: what to check first

A Samsung washer not spinning means the machine is skipping spin, failing to reach spin speed, or stopping spin after it…

Read the fix →

SESamsung washer code SE: what it means and how to fix it

Samsung washer code SE means the washer is not draining at the right speed, or it is not draining at all. The most…

Read the fix →

UBUB code Samsung washer: what it means and what to check

The UB code on a Samsung washer means the machine detected an unbalanced load and stopped the spin cycle to protect…

Read the fix →

Common questions about appliance repair

Is SUD the same as 5UD, Sd, or 5d?

Yes. On Samsung washer displays, those versions usually mean the same excess-suds fault. The 5 can look like an S, so don't treat 5UD as a separate code.

Can I reset a Samsung washer SUD code?

You can unplug the washer for a few minutes, then plug it back in. That may clear the display, but it won't remove soap left in the tub or a clog in the filter.

Why does SUD come back when I don't see bubbles?

The washer may still have detergent residue in the sump, a slow drain, or a pressure sensor line coated with soap film. A clogged filter can also trap soapy water where you can't see it.

Can I keep using the washer with the SUD code?

Don't keep adding detergent or restarting full loads. Clear the suds with rinse cycles and clean the filter first, because repeated suds-lock routines can make cycles run long and stress the drain pump.

Is a Samsung SUD code covered by warranty?

Check your Samsung warranty terms and purchase date. Detergent use, overloading, or a clogged filter may be treated differently than a failed pump, pressure switch, or control board.

Still showing the problem after the checks?

Call and describe what you tried. You'll be connected with an independent repair company near you.

(888) 280-5160