The Whirlpool washer
error code F21 means the washing machine has a "
water draining issue", meaning the drain pump itself, or the drain hose is clogged and the washer is having problems draining the water out. In other words, the washer is taking too long to drain the water out of the tub.
Nov. 15, 2016
Videos as well
https://www.google.com/search?q=code+f21+on+a+whirlpool+duet+mean
..
All set replaced pump.
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