Troubleshooting Maytag Dishwasher 6-4 Error Code: A Step-by-Step Guide

A Maytag dishwasher displaying a 6-4 error code might seem daunting, but with the right guidance, you can troubleshoot and resolve it without professional help. Here’s everything you need to know to get your dishwasher back in action.

What Does the 6-4 Error Code Mean?

This error indicates an issue with the water level control system, specifically a problem with the float switch. The float switch acts as a safeguard, monitoring the water level in the dishwasher tub. If the tub overfills, the switch shuts off the water inlet valve to prevent leaks or damage.

Common Causes of a 6-4 Error Code

Understanding what might trigger the 6-4 error code can help you pinpoint the issue more efficiently. Here are some common reasons:

1. Float Switch Malfunction: The float switch itself could be faulty due to wear and tear, preventing it from accurately detecting water levels.
2. Blockages or Debris: Residual food particles or debris may interfere with the float’s movement or block the switch mechanism, leading to a false reading.
3. Electrical Connection Issues: Loose or corroded wires connected to the float switch can disrupt its function, causing the error code to appear.
4. Faulty Control Board: Though less common, a malfunctioning control board might misinterpret signals from the float switch, resulting in the 6-4 error.
5. Overfilling or Drainage Problems: If the dishwasher is overfilling or not draining correctly, it may cause the float switch to engage unnecessarily.

Tools You’ll Need

• Multimeter
• Screwdrivers

Safety First

Before you begin, it’s important to prioritize safety. Follow these precautions to ensure a smooth and safe repair process:

1. Disconnect Power: Unplug the dishwasher or switch off its circuit breaker to eliminate any risk of electric shock.
2. Turn Off Water Supply: Shut off the water valve connected to the dishwasher and have towels ready to catch residual water.
3. Wait for Cooling: Allow the dishwasher to cool down if it was recently used.
4. Dry Workspace and Hands: Ensure your hands and workspace are dry before handling any components.
5. Use Proper Lighting: Work in a well-lit area to clearly see and access parts.
6. Organize the Space: Keep the workspace clutter-free, and ensure children and pets stay away.
7. Handle Parts Gently: Avoid excessive force to prevent damage or injury.
8. Wear Insulated Gloves: Protect your hands from sharp edges and debris with insulated work gloves.
9. Take Notes or Photos: Document the wiring connections or component positions before disassembling anything to simplify reassembly.

How to Troubleshoot the 6-4 Error Code on a Maytag Dishwasher

Step 1: Inspect the Float Switch

1. Locate the float switch near the bottom of the dishwasher tub.
2. Inspect the float switch and surrounding area for obstructions or debris.
3. Lift the float gently and listen for a “click” as the float moves up and down.
4. Clean the float and switch mechanism if it’s stuck or not clicking.
5. Check the dishwasher’s level using a bubble level.
6. Adjust the leveling legs if necessary to make the dishwasher level.

Step 2: Check for Excessive Sudsing

1. Ensure the dishwasher is plugged in and the water supply is turned on.
2. Run the dishwasher for about one minute to fill and wash.
3. Open the door and inspect for excessive sudsing or foaming in the tub.
4. If there is excessive sudsing, disconnect the power to the dishwasher.
5. Inspect the detergent dispenser for damage or leaks.
6. Replace the dispenser if it’s damaged.

Step 3: Inspect the Drain Hose Check Valve

1. Find the drain hose connection at the back of the dishwasher.
2. Disconnect the drain hose from the plumbing connection.
3. Elevate the drain hose above the dishwasher tub level.
4. Pour water into the drain hose and check if it flows back into the dishwasher tub.
5. If water flows back, replace the entire drain loop assembly.
6. When installing a new drain loop, position it as high as possible and secure it to the underside of the countertop.

Step 4: Check the Fill Valve

1. Observe if the dishwasher fills with the door open.
2. If the dishwasher fills with the door open, replace the fill valve.
3. If the dishwasher does not fill with the door open, start a service diagnostic test:
   • Enter the diagnostic cycle by pressing a sequence of three keys (e.g., 1-2-3) three times within one second between presses.
   • Close the door to start the diagnostic cycle and advance until the detergent dispenser opens.
4. Check if the dishwasher is filling during this stage.
5. If the dishwasher fills during the diagnostic test, unplug it and replace the control board.

Also Read: Clear the 7-1 error code on a Maytag dishwasher with this troubleshooting guide

Conclusion

And there you have it! Fixing a 6-4 error code on your Maytag dishwasher might feel overwhelming at first, but with a little patience and the steps outlined here, you can handle it like a pro. Just remember to prioritize safety, stay organized, and take your time as you troubleshoot each component.

If you’ve gone through all the steps and the issue persists, it might be time to consider reaching out to a professional for assistance. But, now you’re way more informed and can explain the situation clearly, saving time and effort.