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Error code reference

Kenmore Washer Error Code F/21

Long drain

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What the F/21 error code actually means

Your Kenmore washer is showing F/21 because it took too long to pump the water out, so it stopped the cycle to protect itself. This usually means something is blocking or slowing down the drain, like a kinked hose or a clogged filter. Checking the drain hose for kinks or blockages is the first and often easiest fix.

Diagnostic procedure

The full F/21 procedure

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1
First diagnostic step
Check the drain hose and make sure it is not plugged or kinked.
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Most common causes of F/21

Ranked by how often they cause this code
  1. 1Kinked or blocked drain hose
  2. 2Clogged pump filter or trap
  3. 3Failing or seized drain pump
  4. 4Improper drain hose installation
  5. 5Foreign object obstruction in drain path

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Questions people ask about F/21

What does F/21 mean on a Kenmore washer?
F/21 on a Kenmore washer means the machine detected a long drain fault. The washer was unable to fully drain the tub within 8 minutes, so the control board shut off the water valves and stopped the cycle. This code always points to a restriction or failure in the drain system.
Will resetting my Kenmore washer clear the F/21 code?
Resetting the washer may temporarily clear the F/21 code, but the fault will return if the underlying drain issue is not resolved. The code will reappear as soon as the next cycle attempts to drain and again exceeds the 8-minute limit. Always address the root cause before relying on a reset.
How much does it cost to repair a Kenmore washer F/21 error?
If the fix is a simple clog or kinked hose, there may be no parts cost at all, only your time. Cleaning a pump filter is also a no-cost repair in most cases. If the drain pump needs to be replaced, parts and labor costs typically range from around $150 to $350 depending on your location and the specific model.
How do I fix F/21 on my Kenmore washer?
Start by checking the drain hose for kinks, clogs, or improper installation at the standpipe. If the hose looks clear, clean the pump filter if your model has one, removing any lint or debris. If the code persists after those steps, the drain pump may need to be tested and potentially replaced.
Is it safe to use my Kenmore washer when F/21 is showing?
You should not continue running cycles with an active F/21 code. The washer is alerting you that water is not draining correctly, and continuing to use it could leave standing water in the drum and potentially cause water overflow or damage to the pump. Diagnose and clear the drain issue before resuming normal use.

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