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How do you fix the F21 error code on a Whirlpool washer?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The f21 error code on a Whirlpool washer indicates that there is a problem with the drain pump. This error code can be caused by a clogged drain pump, a damaged drain pump, or a problem with the drain pump circuitry. If the drain pump is clogged, it will need to be cleaned out. If the drain pump is damaged, it will need to be replaced. If there is a problem with the drain pump circuitry, it will need to be repaired.

Users typically search for a solution by asking about:

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  • f21 error code whirlpool washer

1. Check the drain hose for a clog

  1. Open the front cover of the washer and remove the drum.
  2. Inspect the drain hose for a blockage. If there is a blockage, use a plunger to clear it.
  3. Reconnect the drain hose to the water inlet on the drum.
  4. Spin the drum to check for water flow. If there is no water flow, the drain hose may be clogged.
  5. If the drain hose is clogged, use a plunger to clear the blockage.
  6. Reattach the front cover and drum.

2. Check for a kink in the drain hose

  1. If you have a dishwasher with a built-in drain hose, remove the hose from the dishwasher. If the hose is attached to the dishwasher by a clamp, pry the clamp open with a flat-head screwdriver.
  2. If the hose is not attached to the dishwasher, remove the dishwasher’s lower cabinet by unscrewing the four screws that hold it in place.
  3. Locate the drain hose and examine it for kinks or damage. If the hose is kinked or damaged, use a plumber’s snake to fix the kink or damage.
  4. Replace the hose if it is kinked or damaged. Reconnect the hose to the dishwasher and replace the cabinet screws.

3. Check the washer's drain pump for a clog

  1. Remove the washer's front panel.
  2. Look for any debris or bubbles in the drain pump's hose or in the pump's drain.
  3. If you see debris or bubbles, clean them up and replace the pump if necessary.
  4. Reconnect the hose to the pump.
  5. Turn on the washer and check the drain pump's operation.
  6. If the pump is not operating properly, replace it.

4. Clean the washer's filters

  1. Turn off the washer and unplug it from the wall.
  2. Open the door of the washer.
  3. Remove the front panel of the washer by pressing down on the tabs and pulling it forward.
  4. Underneath the front panel, you will see three filters. The middle filter is the largest and is located in the center of the washer. The other two filters are on either side of the middle filter.
  5. To clean the filters, use a vacuum cleaner and a hose. Make sure to use the correct filter for your washer. If you don't know which filter to use, consult your owner's manual.
  6. Replace the front panel of the washer and plug it back in to the wall.

Some users might also have success with the following opitons:

  1. Check the washer's water inlet valve for a clog.
  2. Check the washer's pressure switch for a clog.
  3. Clean the washer's drain pump filter.
  4. Run a cycle with a washer cleaner.