This hinders smooth flow of water from the machine, hence triggering error code F21. If the drain hose was not installed properly, it could hinder drainage from the washer.įor instance, installing the drain hose higher than 96″ from the floor can lead to siphoning. As you are aware, different requirements need to be met while choosing the location and installing the washing machine. If the washer was recently installed or moved, the problem is more likely to be Improper Installation. Here are some of the things that are known to trigger the Whirlpool washer error code F21: Improper Installation Error code F21 can also point to a problem within the drain system. In such a case, resetting the machine will clear the error code form display. Washing machine error code, including error code F21, are often triggered by a glitch within the Whirlpool washer circuit board. What Causes the Whirlpool Duet Washer Error Code 21? If none of these is the problem, you should have the drain pump diagnosed and replaced, if faulty. Using the wrong detergent on the washer can also trigger error code F21 due to excessive formation of suds.īe sure to use the recommended high-efficiency (HE) detergent only. If it reappears after resetting, you need to check the drain hose, and filter for clogs and remove them. To fix the problem, you should first reset the washer to clear the error. In most cases, the error code man’s that something is blocking the normal flow of water down the drain hose. If it takes longer than that, the Whirlpool Duet washer error code F21 will be triggered. In proper working condition, the Whirlpool Duet washer should drain in less than 8 minutes. If the error resurfaces after your have reset the machine, you can use the methods discussed in this guide to troubleshoot and fix it. As such, it is advisable to first reset the Whirlpool front load washer to clear the error code. However, it may also be triggered by a minor glitch on the circuit board of the washer. You may also get this error code on your washer when the drain pump is not working or the drain pump filter is clogged. You may also get this error when you use the wrong detergent on the front load washer.
Being a drainage problem, you need to inspect the drain hose for kinks or clogs that may be locking the flow of water. You will get error code F21 on your Whirlpool Duet washer when the unit is taking too long to drain.