Seeing the W04 error code on your Admiral washer? Don’t panic — this alert means your washing machine has detected an overflow condition, often related to detergent overuse or a water level sensor issue. Luckily, many of the causes are easy to fix. In this guide, we’ll explain the most common reasons for a W04 error and show you how to resolve the problem safely.

What does the W04 error mean?

The Admiral washer W04 error signals that your washer has stopped the cycle to prevent a potential overflow. This happens when the washer’s internal sensors detect:

• Too much water in the drum
• Excessive suds from detergent buildup

This is a built-in safety feature to avoid water spilling onto your floor or damaging internal components. If not addressed, it can lead to leaks or long-term wear on your washer.

Common causes and how to fix them

Here are the most common reasons behind a W04 overflow detected washer alert and how to resolve each one:

1. Excess detergent or wrong detergent type

Cause: Using too much detergent — or using the wrong kind (like non-HE powder or liquid) — can create excess foam that mimics an overflow condition.

Fix:

• Always use HE (High-Efficiency) detergent designed for modern washers.
• Follow the detergent dosage instructions in your user manual. Most loads only need a small amount.
• Avoid fabric softeners or additives that can contribute to suds buildup.

2. Oversudsing from previous loads

Cause: Even if you use the right detergent, leftover soap residue from past cycles can build up over time and cause foaming.

Fix:

• Run a Rinse & Spin cycle with no detergent to flush out suds.
• Clean the detergent drawer and drum using a damp cloth and warm water.
• Perform monthly cleaning cycles with washer cleaner to remove buildup.

3. Faulty water level sensor or pressure switch

Cause: If the washer overfills or shows the W04 error without excess detergent use, the water level sensor or pressure switch may be malfunctioning.

Fix:
This is a job for a professional. A technician can:

• Test the water level sensor
• Check for wiring issues or shorts
• Replace the sensor if it fails resistance or continuity tests

4. Blocked air tube or pressure hose

Cause: A clogged air tube or pressure hose can prevent the machine from accurately detecting the water level.

Fix:

• Turn off and unplug the machine.
• A technician will need to inspect the tubing and clear any obstructions, such as lint, soap residue, or trapped water.

When to call a technician

Sometimes DIY efforts aren’t enough to solve the problem. Call a professional if:

• The W04 error keeps returning, even after running rinse cycles
• The washer overfills when not in use
• You see leaks, error loops, or hear unusual buzzing or clicking
• You’re unsure how to access or replace internal components

An experienced technician can quickly diagnose and fix the issue, often the same day.

Conclusion

The Admiral washer W04 error usually points to overflow caused by too much detergent or foam. But in some cases, it may signal a deeper issue with sensors or tubing. Thankfully, you can often fix the problem by adjusting detergent use and running a few rinse cycles.

If the error persists or you’re unsure about electrical parts, it’s best to call in a pro. Prompt action can prevent water damage and help your washer run safely for years to come.