Whirlpool Washer F21 Error Code — What It Means
F21 is a long drain error on Whirlpool front load washers. The control expects the tub to empty within a set time. When water is still sitting in the tub after that window, the washer stops the cycle and shows F21.
Common Causes
- Clogged drain filter Lint, coins, hair, and fabric threads build up in the pump filter and choke off water flow.
- Kinked or clogged drain hose A bent or blocked drain hose stops water from leaving the machine.
- Standpipe or sink clog A blocked household drain backs water up into the washer.
- Failing drain pump A worn or jammed drain pump cannot move water fast enough to clear the cycle.
- Loose pump wiring A loose harness connector at the pump can break the circuit and stall draining.
Step-by-Step Fix
- Cut power first by unplugging the washer so you can work safely around standing water.
- Open the lower front service panel and place a towel and shallow pan under the filter.
- Unscrew the round drain filter counterclockwise and pull out any debris you find.
- Inspect the drain hose for kinks and run water through it to clear any clog.
- Check the house standpipe or laundry sink for a backup that blocks the washer.
- Restore power and run a Rinse and Spin cycle to confirm the water drains.
- If water still pools, test the drain pump for continuity and replace it if it reads open.
Parts Often Needed
| Part | Notes |
|---|---|
| Whirlpool washer drain pump | Amazon | Match the part number to your model tag, since pump styles differ across series. |
| Washer drain hose | Amazon | Replace if the hose is cracked, collapsed, or clogged past cleaning. |
| Drain pump filter or trap | Amazon | Some models offer a replaceable filter cap if the threads strip. |
When to Call a Pro
If the filter and hose are clear and a new pump does not clear the code, the issue may sit in the main control board or wiring. Call a technician if you are not comfortable testing components with a multimeter.