Whirlpool Washer F21 Error Code – Drain Problem Fix

If your Whirlpool washer is showing the F21 error code, you're dealing with a drain problem. This comprehensive guide will help you understand what's causing the error and how to fix it quickly.

What Does the Whirlpool F21 Error Code Mean?

The F21 error code on Whirlpool washers indicates a long drain time. This means your washer cannot remove water from the tub within the expected time frame (usually 8 minutes).

When the washer's control board detects that water is draining too slowly or not at all, it triggers the F21 error and stops the cycle to prevent flooding or damage.

Most Common Causes

• Clogged drain pump – Debris like coins, socks, or lint blocking the pump
• Blocked drain hose – Kinked or clogged drain hose preventing water flow
• Failed drain pump motor – Pump motor has burned out or seized
• Debris in pump filter – Lint trap or filter needs cleaning
• Faulty pressure switch – Not detecting water level correctly

Parts That Usually Fix the F21 Error

In most cases, fixing the F21 error involves replacing the washer drain pump. Here are the most common replacement parts for Whirlpool washers:

How to Fix the Whirlpool F21 Error

Follow these troubleshooting steps to diagnose and fix the F21 error code:

Step 1: Check the Drain Hose

1. Pull the washer away from the wall
2. Inspect the drain hose for kinks or blockages
3. Disconnect the hose and check for clogs
4. Ensure the hose is not inserted too far into the standpipe (max 8 inches)

Step 2: Clean the Drain Pump Filter

1. Unplug the washer
2. Remove the lower front access panel (usually bottom right)
3. Place towels on the floor to catch water
4. Slowly unscrew the drain pump filter (counterclockwise)
5. Remove any debris, lint, coins, or small items
6. Clean the filter and reinstall

Step 3: Test the Drain Pump

1. Access the drain pump (behind lower front panel)
2. Check for visible damage or debris
3. Manually spin the pump impeller – it should rotate freely
4. If the pump is seized, humming, or not working, it needs replacement

Step 4: Replace the Drain Pump

1. Unplug the washer and turn off water supply
2. Remove the lower front access panel
3. Disconnect the wire harness from the pump
4. Remove the hose clamps and disconnect hoses
5. Remove mounting screws and pull out the old pump
6. Install the new pump in reverse order
7. Reconnect hoses, wire harness, and test

⏱️ Estimated Repair Time: 30–45 minutes for most DIYers

Signs Your Drain Pump Is Failing

Watch for these warning signs that indicate your drain pump needs replacement:

• ✗ Washer not draining completely
• ✗ Loud humming or grinding noise during drain cycle
• ✗ Standing water left in the tub after cycle
• ✗ Washer stops mid-cycle with F21 error
• ✗ Burning smell coming from the washer
• ✗ Water drains very slowly (takes over 8 minutes)

Compatible Washer Brands

The F21 error code can appear on washers made by these brands (all owned by Whirlpool Corporation):

Frequently Asked Questions

Still have questions about the F21 error? Contact our expert support team and we'll help you diagnose the problem and find the right replacement part.