Whirlpool Washing Machine Error F21
⚡ Quick Answer: The Whirlpool Washing Machine F21 error code signifies a drainage issue, indicating that the washer is unable to drain water within the expected time.... ✅ DIY Fixable
What Does Error F21 Mean?
The Whirlpool Washing Machine F21 error code signifies a drainage issue, indicating that the washer is unable to drain water within the expected time. This often occurs during the drain or spin cycle, leaving water in the drum and causing the machine to stop mid-cycle. Common causes include kinks or clogs in the drain hose, a malfunctioning drain pump, excessive suds from overloading, or communication issues with the pressure switch or control board.
Common Symptoms:
- Error appears during drain or spin cycle when washer fails to drain water within expected time (long drain).
- Washer stops mid-cycle with water remaining in the drum.
- Error persists despite normal operation of other functions.
Possible Causes
- Drain hose kinked or clogged (high)
- Malfunctioning drain pump (blocked or faulty) (medium)
- Excessive suds or overloaded/imbalanced load (medium)
- Pressure switch or control board communication issue (low)
How to Fix Error F21
DIY Fix Check and Clear Drain Hose and Filter
- Unplug the washer from power.
- Inspect the drain hose for kinks, twists or blockages; straighten and clear any obstructions.
- Locate and clean the drain pump filter (usually behind a lower front panel) by removing debris and rinsing.
- Reassemble and run a rinse/spin cycle to test drainage.
DIY Fix Reduce Load Size and Use Proper Detergent
- Remove excessive items to reduce load size.
- Use only the recommended amount of HE (High Efficiency) detergent to avoid excess suds.
- Run a normal or rinse/spin cycle to see if F21 clears.
Technician Only Inspect and Service Drain Pump or Electrical Components
- Disconnect power and access the drain pump assembly.
- Check the drain pump impeller and housing for obstructions or damage.
- Test the drain pump motor and wiring harness for proper function with a multimeter.
- Verify pressure switch operation and control board signal integrity.
Parts needed: Drain pump, Drain pump filter, Pressure switch, Control board (if faulty)
- If cleaning the drain hose and filter does not resolve the issue.
- If there are signs of pump motor failure (no sound or strange noise) after clearing debris.
- If error persists and electrical or internal components are suspected.
Next step
Choose the next step for F21
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Drain Pump
Pumps waste water out of the appliance during the drain cycle.
- Typical part-only price
- $35 - $80
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Pressure Switch
Detects the water level inside the tub and signals when to start or stop filling.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
Model-compatible Washing Machine parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Washing Machine Cleaner Tablets
Routine tub-cleaning supplies for residue and odor control. They do not repair a mechanical, drainage, or electronic fault.
Braided Washer Inlet Hoses
A maintenance replacement option for visibly worn external fill hoses. Verify thread size, length, and hot/cold connection requirements.
Washer Drain Hose Holder
Helps secure an external drain hose at the standpipe. It does not correct an internal pump or control fault.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does F21 error mean on Whirlpool Washing Machine?
F21 indicates a drainage problem where the washer fails to drain water in time, often leaving water in the drum.
Can I fix Whirlpool Washing Machine F21 error myself?
Yes, you can check and clear the drain hose and filter, reduce load size, and use the proper detergent to resolve the issue.
How much does it cost to fix F21 error?
Repair costs vary; pump replacement is typically mid-range, while control board replacement is higher.
When should I call a technician for F21?
Call a technician if cleaning the drain hose and filter doesn't work, or if you suspect pump or electrical component failure.
Sources & References
- Whirlpool F21 Error Code Support Page (official)
Data last verified: 2026-07-31
User Comments (0)
Share your experience or solution below.
Please login to post a comment.
Be the first to comment!