What Does Error Code F9 Mean?

Error F9 on your Whirlpool Dishwasher means: The Whirlpool Dishwasher error code F9 indicates a problem with the diverter or vent wax motor. This error can cause issues with water flow and drainage, resulting in poor cleaning performance or even complete failure to run a cycle. If left unchecked, the wax motor can overheat and fail, requiring costly repairs.

What You'll Need

🔧 Tools

Phillips #2 screwdriver
T20 Torx screwdriver
Multimeter (for testing electrical connections)

🛒 Parts

Wax motor assembly

How to Fix Error F9 — Step by Step

1

Step 1: Check for a Simple Fix (Power Cycle)

First, try power cycling your Whirlpool Dishwasher to reset the control board. Unplug the dishwasher from the power outlet, wait for 30 seconds, and then plug it back in. This can often resolve the issue without requiring further troubleshooting. If the error code persists, proceed to the next step.

💡 Pro Tip: Power cycling can often resolve issues related to faulty sensors or control board malfunctions.
2

Step 2: Check the Wax Motor Assembly for Obstructions

Locate the wax motor assembly and inspect it for any blockages or debris. Use a soft brush or cloth to clean out any obstructions, taking care not to damage the assembly. Check for any signs of wear or damage on the motor itself. If you find any issues, replace the wax motor assembly.

💡 Pro Tip: Regular cleaning can help prevent wax motor failures by ensuring proper airflow and water flow.
3

Step 3: Check the Electrical Connections

Use a multimeter to test the electrical connections to the wax motor assembly. Check for any signs of wear or damage on the wires or connections. If you find any issues, replace the wiring harness or connections as needed.

💡 Pro Tip: Faulty electrical connections can cause a range of issues, including error codes and poor performance.
4

Step 4: Replace the Wax Motor Assembly (if necessary)

If you've determined that the wax motor assembly is faulty, replace it with a new one. Make sure to purchase a genuine Whirlpool part or a high-quality aftermarket equivalent. Follow the manufacturer's instructions for installation.

💡 Pro Tip: Replacing the wax motor assembly can be a bit tricky, so be sure to follow the manufacturer's instructions carefully to avoid any issues.
5

Step 5: Test the Dishwasher

Once you've completed the repairs, test the dishwasher to ensure the error code has been resolved. Run a few cycles to verify proper function and cleaning performance.

💡 Pro Tip: Testing the dishwasher thoroughly can help ensure that the repairs have been successful and that the error code has been resolved.

When to Call a Professional

If you'd rather not risk further damage to the appliance, or if you're unsure about the cause of the error code, a factory-authorized service technician can help. They can help you identify the root cause of the problem and provide a more accurate estimate for the repairs.

Field note: F9 means the machine did not see a drain complete — it is not a default control-board part. On Whirlpool Dishwashers start at the filter/sump, high-loop / height of the drain hose, and the impeller. A crushed hose or a coin on the impeller looks identical to a ‘bad pump’ on a scan tool.

What this code is not

Not ‘replace the board because it will not empty.’
Not a water-inlet problem (that is a fill code).
A missing high loop that siphons, or a disposer knockout still in place, will retrip F9 after any new pump.

The F9 Error: What’s Going On

The Whirlpool Dishwasher error code F9 is a relatively common issue that can be caused by a range of factors, including faulty sensors, control board malfunctions, and wax motor failures. The wax motor is responsible for controlling the flow of water into the dishwasher, and a faulty motor can cause issues with drainage and cleaning performance. If left unchecked, the wax motor can overheat and fail, requiring costly repairs.

Related issue? If your Whirlpool dishwasher is showing a different error code, see our guide on Whirlpool Dishwasher Error F3.

Common Causes

Here are some of the most common causes of the Whirlpool Dishwasher error code F9:

Faulty wax motor assembly
Obstructions or debris in the wax motor assembly
Electrical connections issues
Control board malfunctions
Faulty sensors

Before You Start

the Whirlpool Dishwasher error code F9 can be caused by a range of factors, and it may be necessary to troubleshoot the issue before attempting repairs. If you’re unsure about the cause of the error code or If you’d rather not risk further damage to the appliance, a factory-authorized service technician can help.

also, regular cleaning and maintenance can help prevent wax motor failures and other issues that can cause the Whirlpool Dishwasher error code F9. Make sure to follow the manufacturer’s instructions for cleaning and maintenance to ensure optimal performance and longevity of your dishwasher.

In terms of cost estimates, the replacement cost for a wax motor assembly can range from $100 to $300, depending on the model and quality of the part. Labor costs for a professional technician can range from $100 to $200, depending on the location and complexity of the repair.

If you’re experiencing the Whirlpool Dishwasher error code F9, it’s essential to address the issue promptly to avoid any further damage or costly repairs. By following the steps outlined above and taking the necessary precautions, you can resolve the issue and ensure optimal performance and longevity of your dishwasher.

Related Troubleshooting Guides

These guides cover similar issues you might find helpful:

🔧 Not Sure Whether to Repair or Replace?

Use free calculators: fix-or-replace, repair cost estimate, or full ApplianceIQ diagnosis.

Fix or Replace Calculator → ApplianceIQ →

Did This Fix Work?

Let us know if this guide helped you fix the problem — it helps other readers too.

Questions & Comments

Have a question about this repair or want to share your experience? Leave a comment below.

No comments yet. Be the first to share your experience!

What Does Error Code F9 Mean?

What You'll Need

🔧 Tools

🛒 Parts

How to Fix Error F9 — Step by Step

Step 1: Check for a Simple Fix (Power Cycle)

Step 2: Check the Wax Motor Assembly for Obstructions

Step 3: Check the Electrical Connections

Step 4: Replace the Wax Motor Assembly (if necessary)

Step 5: Test the Dishwasher