LG WM3998 All-in-One Washer-Dryer Combo

<strong>Quick answer:</strong> The LG WM3998 All-in-One Washer-Dryer Combo is a well-documented washer with known repair patterns. Most common issue: Dry cycle taking 2-3 hours. Dealing with a LG WM3998 washer that is not working right? You are in the right place. We have compiled service data across every model in this series — top failures and their frequency, error code lookup, parts sourcing, <a href="https://www.cpsc.gov/Recalls" rel="nofollow noopener" target="_blank">recall</a> checks, and an honest repair-vs-replace framework tied to unit age.

Models Covered in This Guide#

This guide covers the LG WM3998 series washers, manufactured from 2019-2023. The following model numbers share the same platform, parts catalog, and common failure modes:

• WM3998HBA
• WM3555HVA

All models listed above use the same core components and are serviced with the same replacement parts. If your specific model number starts with the same prefix but is not listed, this guide still applies — LG uses common platforms across model variants within a series.

Quick Specifications#

Top 5 Most Common Problems#

Based on repair data for LG WM3998 washers, these are the most frequent issues ranked by how often we see them in service calls. Understanding these common failures helps you identify problems early and make informed repair decisions.

1. Dry cycle taking 2-3 hours (25% of repairs)#

Dry cycle taking 2-3 hours — significantly longer than standalone

Part involved: Condenser coil cleaning (maintenance) Frequency: This issue accounts for approximately 25% of all service calls on the LG WM3998 series.

2. Condensation drain pump failure (25% of repairs)#

Condensation drain pump failure

Part involved: Drain pump 4681EA2001T Frequency: This issue accounts for approximately 25% of all service calls on the LG WM3998 series.

3. Ventless system overheating (20% of repairs)#

Ventless system overheating — HE error

Part involved: Condenser coil/fan assembly EAU62983008 Frequency: This issue accounts for approximately 20% of all service calls on the LG WM3998 series.

4. Door boot gasket mold (15% of repairs)#

Door boot gasket mold — worse than standalone washers

Part involved: Door boot seal MDS47123608 Frequency: This issue accounts for approximately 15% of all service calls on the LG WM3998 series.

5. Bearing wear (15% of repairs)#

Bearing wear — accelerated vs standalone from dual use

Part involved: Bearing/seal kit 4036ER2004A Frequency: This issue accounts for approximately 15% of all service calls on the LG WM3998 series.

Error Codes for LG WM3998#

The LG WM3998 series may display the following error codes on its control panel or digital display. Error codes are your washer's way of telling you what component has failed or what condition has been detected. Click any code below for a detailed diagnosis guide with step-by-step repair instructions:

• Error OE — click for full diagnosis and fix
• Error LE — click for full diagnosis and fix
• Error DE — click for full diagnosis and fix
• Error D80 — click for full diagnosis and fix

If your LG WM3998 is displaying an error code not listed above, try a power reset first: unplug the unit (or flip the circuit breaker) for 60 seconds, then restore power. Many transient errors clear with a simple reset. If the code returns, the underlying issue requires professional diagnosis.

Which Parts Commonly Fail?#

These are the parts most frequently replaced on LG WM3998 washers. Part numbers are specific to this series — when ordering, always verify the part number against your exact model number, as there may be minor variations between production years.

Part costs vary by model and supplier. Professional installation adds additional labor cost depending on the complexity of the repair and your location.

Detailed Part Replacement Guides#

These guides cover the full replacement process including tools needed, step-by-step instructions, and what to test after installation:

• Lg Washer Drain Pump Replacement Guide
• Lg Washer Gasket Replacement Guide
• Lg Washer Motor Replacement Guide

Recall Status#

There are no active recalls on the LG WM3998 series as of 2026-05-28. We recommend checking the Consumer Product Safety Commission at cpsc.gov periodically with your specific model number, as recalls can be issued at any time. You can also sign up for email alerts on the CPSC website to be notified if a recall is issued for your appliance.

Repair vs. Replace: When Is It Worth Fixing Your LG WM3998?#

This is the most common question we hear from LG WM3998 owners. The answer depends on three factors: the age of the unit, the cost of the repair, and the cumulative repair history.

All-in-one combos is competitively priced. Bearing wear is accelerated vs standalone (both wash and dry cycles stress bearings). Bearing replacement on units over 8 years is borderline. Drain pump and gasket repairs are always cost-effective.

General rule for the LG WM3998: If the unit is under 8 years old and the repair costs less than 50% of a new equivalent model, repair is almost always the better value. After 8 years, evaluate the total repair history — if cumulative repairs over the past 2-3 years exceed 40% of replacement cost, upgrading to a new unit provides better long-term value and a fresh warranty.

Repair Decision Matrix by Age#

| Unit Age | Minor Repair | Major Repair | Critical Repair | |---|---|---|<p>Based on our repair experience and customer feedback, dealing with a lg wm3998 washer that is not working right?.</p>

---| | Under 4 years | Repair | Repair | Repair (usually) | | 4-8 years | Repair | Evaluate total history | Consider replacing | | Over 8 years | Repair if otherwise healthy | Consider replacing | Replace recommended |

Preventive Maintenance for LG WM3998#

Regular maintenance is the most cost-effective way to extend the life of your LG WM3998 washer and prevent the common failures listed above. Follow these practices:

1. Clean condenser coil/filter every 2-3 months — critical for drying performance
2. Don't do full wash+dry on max capacity — use 50-60% for best drying
3. Leave door ajar between uses — mold risk is higher than standalone washers
4. Extended dry times are inherent to ventless — plan accordingly

What Are the Best Long-Term Ownership Tips?#

To extend the life of your washing machine, avoid overloading (follow the manufacturer's load size guide), always use HE detergent in the recommended amount, and run a cleaning cycle monthly. For front-load washers, leave the door ajar between loads to prevent mold growth on the door gasket. For top-load washers, distribute clothes evenly before starting the spin cycle. Check pockets before every load — coins, keys, and small items entering the drain pump are the single most common cause of washer failure.

Frequently Asked Questions#

Can an LG all-in-one washer-dryer replace separate machines?#

Functionally yes — it washes and dries in one unit without a vent. However, compromises: (1) drying takes 2-3 hours vs 45-60 minutes for standalone, (2) you can't wash one load while drying another, (3) capacity for drying is lower than the wash capacity (dry at 50-60% fill). It's ideal for space-constrained installations where a separate dryer won't fit.

Why does my LG combo dryer take so long?#

Ventless condensation drying is inherently slower than vented drying. The combo uses cold water flowing through a condenser coil to remove moisture from the air — this process is less efficient than hot exhaust venting. Clean the condenser coil/filter every 2-3 months and don't overload the dryer portion for best results.

Need Professional Help With Your LG WM3998?#

We've repaired thousands of LG WM3998 washers across Sacramento and the Bay Area. Our technicians carry the most common LG replacement parts on every service call, which means most repairs are diagnosed and completed in a single visit — no waiting for parts to arrive.

Book your LG WM3998 repair today at /book — same-day and next-day appointments available. We provide upfront pricing before any work begins, and all repairs include a 90-day parts and labor warranty.