Had sporadic f21 code approx every 3 4 washes.
F21 error code kenmore washer.
The causes of the error tips on how to fix the breakage of the washer.
Check the tub for excessive suds.
I finally took the drain lines all off from the drain pump up to the plastic elbow near the top where it exited the washer as well as the next line from that same elbow to.
Oh man this is a great fix.
I would clean the hose and it may work for a bit.
No hose kinks or anything wrong with the drain lines.
Check the drain hose for kinks and clogs.
I had the same problem still getting f21 sud codes even after changing the pressure switch and the drain pump.
If you see this condition then i recommend that you drastically cut back on the amount of he high efficiency detergent that you are using in the washer.
An improperly installed drain hose can prevent the washer from draining properly.
Detailed instructions on how to fix the error code f21 in the kenmore washer.
I was so sick of my washer i always got the f20 and f22 message.
Hope this post saves someone some time money.
Excessive suds can prevent the washer from draining properly and will result in the f21 code.
Found lint debris in the filter.
The f21 code on many kenmore elite front load washers indicates a long drain problem.
This can be caused by excessive suds or a restriction in the drain system.