Whirlpool Washer Sud Error Code: What It Means and How to Fix It

By Dan Mercer · Published October 5, 2026 · Updated October 6, 2026 · Codes covered: Sud, Sd, 5d · Sources

Sud on a Whirlpool washer means it has found too many suds. It isn't a breakdown: the washer starts its own suds-removal routine, and the best thing to do is let it finish. The cause is almost always the detergent or bleach, so you can usually stop the code coming back yourself.

Whirlpool lists Sud and Sd with the same meaning. On some displays Sd may look like 5d. Maytag and Amana washers, also Whirlpool brands, use the same code.

This 3-minute fix saved 0 homeowners a technician visit this month.

What the Sud code means

Whirlpool says that if Sd or Sud (excess suds) appears, the washer "is running a suds reduction routine. Allow the washer to continue."

On front-loaders, Whirlpool explains that the washer can't spin water out through heavy suds. So it extends the rinse, pauses the tumbling and adds water to let the bubbles break. Whirlpool says this pause and rinse may happen several times. Expect a longer cycle.

Check which light is on (front-load):

• Sud with the Rinse light on: the washer is still removing suds. Let it continue.
• Sud with the Cycle Complete light on: the washer found too many suds during the cycle. Whirlpool says the load may not be fully rinsed or spun out. Run a Rinse/Spin cycle.

Look-alike codes:

• F9 E1 means drain times are longer than expected. Whirlpool says excess suds can also slow draining, so the two can show up together.
• F21 is a long-drain code on older Whirlpool front-loaders, such as Duet models. It's a drain problem, not a suds code.

How the code appears varies by model. Check the error code section of your manual.

Likely causes (most common first)

1. Too much detergent. HE detergents come in 2x, 4x and 8x strengths. Whirlpool says using more than the label dose can cause oversudsing.
2. Non-HE detergent. Whirlpool says to use only HE detergent in HE washers.
3. A large detergent pac in a small load. Whirlpool says larger pre-measured pacs are for large or heavily soiled loads only.
4. "No splash" or "easy pour" chlorine bleach. Whirlpool says these contain a thickener that can create excess suds.
5. Adding detergent when the bulk dispenser is on. On models with a bulk dispenser, Whirlpool says extra detergent isn't needed. A wrong concentration setting can also cause suds.
6. Detergent buildup in the washer from past overdosing.
7. A restricted drain hose or standpipe. Whirlpool says Sud can also come from a kinked or clogged drain hose or drainpipe.

How to fix it, step by step

Work through these in order. Run a normal load after each change to see if the code still shows.

1. Let the cycle finish. Don't cancel it. The pauses and extra rinses are the washer fixing the problem.
2. Run a Rinse/Spin if needed. If the cycle ended with Sud showing, or clothes feel soapy or wet, run a Rinse/Spin with no detergent.
3. Check your detergent is HE. Look for the HE logo on the bottle or box.
4. Measure the detergent. Follow the dose on the label for your load size and soil level. Concentrated detergents need far less than older ones.
5. Match pacs to the load. Use a single pac sized for the load, and save large pacs for big or heavily soiled loads.
6. Switch your bleach. If you use "no splash" or "easy pour" bleach, change to regular liquid chlorine bleach.
7. Check the bulk dispenser (if fitted).
   • If it's enabled, don't add detergent by hand as well.
   • Make sure the concentration setting matches your detergent. See your manual.
8. Clean out old detergent. With the drum empty, Whirlpool suggests running the washer with regular liquid bleach, or a Clean Washer cycle with affresh® washer cleaner.
9. Check the drain hose. Pull the washer out gently and straighten any kinks. Make sure the hose isn't clogged.
10. Check the hose setup. Use the U-shaped hose form. Whirlpool says the drain hose shouldn't go more than 4.5 inches into the standpipe. For front-loaders, Whirlpool gives a standpipe height of 39 inches minimum and 96 inches maximum. Check your installation instructions.
11. Stop if Sud keeps coming back. If you're using the right detergent, in the right amount, and the drain is clear, see "Test the part" or call a pro.

Test the part

Sud is rarely caused by a failed part. If it keeps showing even with the right detergent and a clear drain hose, the washer may be draining slowly. The parts to check are the drain pump filter (on front-loaders that have one) and the drain pump.

1. Unplug the washer and turn off both water taps.
2. Find the drain pump filter, if your model has one. Where it is varies by model, and some models have no access door. Check your manual.
3. Drain the water slowly. Use towels and a shallow pan. Follow your manual's steps before you unscrew the filter.
4. Clean the filter. Remove lint, coins and small items, then refit it firmly.
5. Check the impeller. With the filter out, look for anything jammed in the small fan inside the pump.
6. Reach the pump's wires. That usually means removing a lower or rear panel. Watch for sharp edges.
7. Photograph the wires, then pull the connector off by its housing.
8. Check the pump for continuity. Set the meter to the lowest ohms setting and touch a probe to each pump terminal.
   • Some resistance means the motor winding is intact.
   • "OL" (open) means the pump has failed.
   • The correct reading varies by model. Compare against your washer's tech sheet if it lists one.

A pump can pass this test and still drain weakly. If it does and Sud still keeps returning, call a pro. Checking whether the pump gets power means live testing, which isn't a DIY job.

Safety notes

When to call a pro

Call Whirlpool service or a qualified appliance technician if:

• Sud keeps appearing even though you use measured HE detergent and regular bleach.
• Sud shows together with long-drain codes such as F9 E1, and the hose and filter are clear.
• Water stays in the drum and you can't drain it safely.
• The drain pump shows an open circuit, or you see damaged wiring.
• Your washer is under warranty. Check the terms before you open any panels.

Whirlpool US support: 1-866-698-2538 (as listed on Whirlpool Product Help). Maytag owners can call 1-800-344-1274, the number on Maytag's Sud help page.

FAQ

Related

• Sud in the Whirlpool washer error codes table
• Sud in the Maytag washer error codes table
• Sud in the Amana washer error codes table
• F9 E1, drn – long drain (look-alike code)
• F21, F02 – long drain (older front-load) (look-alike code)
• F9 E1, drn – long drain (look-alike code)
• F9 E1, drn – long drain (look-alike code)
• Whirlpool Washer F21 Error Code
• Whirlpool Washer F5 E3 Error Code
• GE Washer 26 Error Code
• Haier Washer E2 Error Code
• Haier Washer E4 Error Code
• Insignia Washer E1 Error Code
• All washer error code guides