What this error means
A Whirlpool washer displaying error code F21 typically indicates a problem with the machine’s drainage system. This means your washer is having trouble emptying water from the drum, often preventing the cycle from completing.
Common symptoms
Beyond the F21 error code appearing on the display, you might notice:
- Water remaining in the drum after the spin cycle.
- The washer stopping mid-cycle with the error code.
- Unusual noises during the attempted drain cycle, such as humming or grinding.
- A longer than usual wash time as the machine struggles to drain.
Likely causes
The F21 error code is almost always related to a blockage or malfunction in the washer’s drain system. The most common culprits include:
- Clogged drain pump filter: This is the most frequent cause and is usually the easiest to fix. Lint, coins, buttons, and other small items can get caught here.
- Blocked drain hose: The hose that carries water from the washer to your home’s drainpipe can become kinked or clogged with debris.
- Faulty drain pump: The pump itself might be malfunctioning, preventing it from pushing water out effectively. This could be due to a worn-out motor or internal damage.
- Pressure switch or hose issue: The pressure switch tells the washer when the drum is empty. If this component or its hose is blocked or faulty, it might incorrectly signal that the washer is still full, halting the drain process.
- Control board issue: While less common, a faulty main control board can sometimes misinterpret sensor readings and trigger the F21 error.
How to fix it
Before you begin, always ensure the washer is unplugged from the electrical outlet and the water supply is turned off to prevent any accidents.
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Check and clean the drain pump filter:
This is the first and most crucial step. The drain pump filter is usually located at the bottom front of your washer, behind a small access panel or kickplate. You may need a flathead screwdriver or a coin to gently pry it open.
What to expect: Have towels and a shallow pan or bucket ready, as some water will likely drain out when you open the filter. Unscrew the filter slowly and carefully. Remove any lint, debris, coins, or other foreign objects you find. Rinse the filter under running water and inspect the housing for any blockages before screwing it back in securely. Close the access panel.
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Inspect the drain hose:
Locate the drain hose, which typically exits the back of your washer and connects to your household plumbing. Ensure it’s not kinked or severely bent. Try to pull the hose out from the standpipe or drain connection to check for any blockages. If you suspect a clog, you can try using a plumber’s snake or a stiff wire to gently push through any obstructions. Be careful not to damage the hose.
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Reset the washer:
After performing the above checks, it’s a good idea to reset the washer’s electronics. Unplug the washer from the wall for at least 5-10 minutes. Then, plug it back in. Try running a short rinse and spin cycle to see if the error code reappears. This simple reset can sometimes clear temporary electronic glitches.
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Test the drain pump (for advanced users):
If the filter is clean and the hose is clear, the drain pump itself might be the issue. This step is more involved and may require some mechanical aptitude. You might need to access the pump directly, which often involves removing panels from the washer. With the washer unplugged, you can sometimes manually spin the pump impeller to see if it moves freely. If it’s seized or damaged, the pump likely needs replacement. If you are not comfortable with this, it’s best to call a professional.
When to contact support or a professional
If you’ve gone through the steps above and the F21 error code persists, or if you’re uncomfortable performing any of the troubleshooting steps (especially those involving accessing internal components like the drain pump), it’s time to seek professional help. This could indicate a more serious internal issue, such as a failed drain pump, a problem with the pressure switch, or a faulty control board, all of which require specialized knowledge and tools to diagnose and repair.
FAQ
Q: How much water should I expect to drain when cleaning the pump filter?
A: You can expect anywhere from a cup to a few gallons of water, depending on how much water is left in the drum when the error occurred. Having towels and a shallow pan or bucket ready is essential.
Q: Can I just bypass the drain pump filter?
A: No, you should never bypass the drain pump filter. It’s a crucial component designed to protect the pump from debris. Attempting to bypass it could lead to severe damage to the pump and potentially other internal components of your washer.
Q: My washer is making a humming noise but not draining. What could it be?
A: A humming noise without drainage often indicates that the drain pump is receiving power but is either blocked or failing. The pump motor is trying to turn, but something is preventing it from moving water. This points to a blockage in the pump itself or a faulty pump motor.
Q: How often should I clean my Whirlpool washer’s drain pump filter?
A: It’s a good idea to check and clean the drain pump filter every 3-6 months, or more frequently if you notice longer drain times or have pets that shed a lot. This preventative maintenance can save you from dealing with error codes like F21.
