Kenmore Error Code F21 — Error Code F21

Service Guy AI • Washer • Medium severity • Intermediate skill • ~30 min repair

Quick fix: Check and clear any blockages in the drain hose.

What Does Kenmore Error Code F21 Mean?

Kenmore washer: Error Code F21

This is a medium-severity fault. The machine may complete the current cycle but is signalling a problem you should resolve before it escalates.

Possible Causes (5)

Kenmore engineers identify the following root causes for fault code F21. Work through them in the order shown — they are listed from most common to least common.

  1. Clogged drain pump
  2. Faulty pressure switch
  3. Blocked drain hose
  4. Door interlock issue
  5. Control board malfunction

Step-by-Step Troubleshooting (6 steps)

Follow this sequence to diagnose and clear Kenmore error code F21. Power down and unplug the machine before any internal inspection.

  1. Disconnect power before servicing.
  2. Check the drain pump for clogs or debris.
  3. Inspect the pressure switch for proper operation.
  4. Examine the drain hose for kinks or blockages.
  5. Test the door interlock for functionality.
  6. Inspect the control board for any visible damage.

Required Parts

Have these Kenmore OEM part numbers ready before starting the repair. AAdvantage Laundry Systems carries verified parts for every code in this database.

  • Drain pump
  • Pressure switch
  • Drain hose
  • Clogged filter
  • Control board

Diagnostic Test Mode

Enter Kenmore diagnostic test mode: Press and hold the 'Start' and 'Pause' buttons simultaneously for 3 seconds.

Skill Level & Repair Time

This repair is appropriate for an experienced laundromat owner or in-house technician. You should be comfortable removing service panels, reading wiring diagrams, and using a multimeter to test continuity and voltage. Plan for approximately 30 minutes of active repair time once parts are on hand.

Get AI-Powered Diagnosis

If the steps above don't resolve Kenmore F21, run a free Service Guy AI diagnosis. Upload a photo of the error display and get an AI-generated repair plan tied to your exact Kenmore model number, including supplier links for required parts and on-call technician escalation.

Other Kenmore Error Codes

F14 — Error Code F14F20 — Error Code F20F01 — Error Code F01F02 — Error Code F02F28 — Error Code F28F33 — Error Code F33F30 — Error Code F30LD — Error Code LD
All Kenmore Error CodesAll Error CodesService Guy AI DiagnosisOrder OEM PartsEquipment Hub

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By — Founder, WashBizHub. Third-generation laundromat operator. Reviewed by the WashBizHub editorial team.

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