LG Washer 5 ud Error Code: Too Many Suds Fix

Quick Answer

If you see 5 ud on your LG display, it is actually reading SUD, which means your washer is choking on too many soap bubbles. Usually, this happens because you used a bit too much detergent or a non-HE soap that creates a mountain of foam the machine can't drain. The first thing to check is your drain pump filter for clogs.

I've seen the 5 ud code more than almost anything else in fifteen years of fixing these things. Looks scary, but it's almost never a broken part. What I usually find is way too much detergent or a clogged filter that nobody's touched since the machine was installed. Ignore it long enough and you'll kill your drain pump, which runs $150-$200 to fix. Totally avoidable.

LgWasherSeverity: moderateDifficulty: easy95% DIY Success

Time to Fix

15–45 min

Difficulty

easy

Parts Cost

$30 – $85

Tools Needed

Shallow drip pan or baking sheet, Old towels, at least 3

What Does the 5-UD Code Mean?

Don't call a repairman yet. Honestly, this shows up on probably 8 out of 10 LG washer calls I get, and 7 of those times it's just detergent. These HE machines use so little water that even a small overdose of soap creates a foam party the drain pump can't handle. Clean the filter, switch to the right detergent, and you're probably done in under an hour.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Using non-HE detergent or too much HE soap65%

Clogged drain pump filter20%

Drain hose installation issues10%

Faulty pressure switch or sensor tube5%

Symptoms You May Notice

5 ud or SUD appears on the display and the cycle just stops cold, sometimes right in the middle of the wash with a full tub of water sitting there going nowhere.
You can see foam up to the top of the drum through the door glass, or it's creeping out of the detergent drawer onto the floor.
The machine is full of water and won't drain. You hear the pump buzzing or humming away but nothing's actually moving.
Cycle times are way longer than they should be, like 2+ hours for a normal wash, because the machine keeps pausing and waiting for foam to settle down before it tries again.
A faint burning smell from the bottom of the machine if you've been running through this error repeatedly and the pump motor is starting to overheat.

Can you reset a Lg washer to clear the 5-UD code?

Hit the Power button to turn it off, then unplug it from the wall for at least 5 minutes. While it's sitting there, go clean that drain filter if you haven't already. Plug it back in and run either the Tub Clean cycle if your model has it, or just a normal cycle with no clothes and no detergent. That flushes out the leftover soap residue and resets the control board.

Tools Required for Diagnosis

Shallow drip pan or baking sheetOld towels, at least 3Flathead screwdriverPhillips #2 screwdriverNeedle-nose pliers

Service / Diagnostic Mode

With the washer on, press and hold the 'Spin Speed' and 'Soil Level' buttons simultaneously until the display lights up and beeps. Press the 'Start/Pause' button to cycle through various component tests including the drain pump and pressure sensor.

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Drain Pump Motor4681EA2001T · $45–$85	4681EA2001T	$45 – $85
Water Level Pressure SwitchEBF61315802 · $30–$65	EBF61315802	$30 – $65

Frequently Asked Questions

Is 5 ud and SUD the same thing?

Yeah, exactly the same code. LG uses seven-segment digital displays, and on those displays a capital S looks basically identical to the number 5. So what you're actually seeing is SUD, short for Suds Detected. Some people panic thinking it's a totally different error from the SUD code they read about online, but it's not. Same thing, same fixes. Don't let the display fool you.

How much detergent should I actually use?

Way less than you think. For most LG HE washers, two tablespoons is the target for a normal load. If you've got soft water, you might need even less. Never fill the detergent cap to the line. Those markings are basically there to make you use more detergent faster so you buy another bottle sooner. For a small or lightly soiled load, one tablespoon is honestly plenty and you won't notice any difference in cleaning.

Can I use vinegar to clear the suds?

Yep. Half a cup of plain white distilled vinegar in the fabric softener compartment, then run a Rinse and Spin with nothing in the drum. The vinegar breaks down the surface tension of the foam and helps it collapse faster. Don't use apple cider vinegar or cleaning vinegar, just the cheap white stuff from the grocery store. And don't mix it with baking soda in the machine at the same time, that's a middle school science project not a repair strategy.

Why does the code happen when I don't see any bubbles?

Usually it's a clogged drain filter or a soap plug in the pressure switch hose. The machine doesn't just visually detect foam. It monitors how hard the pump is working and reads air pressure in the tub through a little hose connected to a pressure switch. If your filter's clogged, the pump struggles, and the board can read that struggle as a suds condition even when you can't see any foam through the door. Start with the filter, it's almost always the culprit.

How often should I clean the drain pump filter?

Every three months is the standard answer, but if you're washing pet hair, kids' clothes, or gym gear regularly, do it monthly. Takes five minutes. The access panel's right there on the bottom front of the machine. Most people never touch it their entire lives and then wonder why they're getting SUD codes and pump failures after two or three years. While you're at it, run a Tub Clean cycle once a month too. Your machine will actually remind you with its own code when it's overdue.

Related Lg Washer Error Codes

Code: OELG Washer OE Error: Not Draining Code: IELG Washer IE Error: Water Inlet Fault

Same Fix on Other Brands

Samsung washerSUD: Samsung Washer SUD Error Code Whirlpool washerSD: Whirlpool Washer SD Error Code

Models Known to Experience 5-UD Errors

This repair applies to most Lg washers with this error code. Common model numbers include:

WM3400CW, WM4000HWA, WM8100HVA, WT7300CW, WM3600HWA, WM9000HVA, WM5000HVA, WM6500HBA

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on May 20, 2024