What should I do if my Whirlpool Duet Front Load Washer displays an F20 error?

Select PAUSE/CANCEL twice, unplug the washer or disconnect power. Check if both hot and cold water faucets are open; ensure no inlet hose connections are clogged or kinked. After addressing these issues, plug in the washer or reconnect power, reselect your cycle, and press START. If problem persists, call for service. (Page 23)