You did not mention whether the washer actually pumps the water out of the washer when you are getting the F21 code. If the washer pumps the water out okay, then the pump and drain system are okay. Excessive suds can prevent the pump from evacuating the water properly and will sometimes result in an F21. When the suds dissipate, the washer will then be able to pump out the water. Look for this type of condition if necessary. If the drain pump runs but the washer will not drain the water, see if the washer will gravity drain. Pull the drain hose out of the stand pipe or sink and place it in a shallow pan at floor level. If the washer will gravity drain okay but will not drain when the drain pump is running then you will likely need to replace the drain pump. If the washer will not gravity drain, then you still have a clog somewhere in the drain system. If you have not pulled the hose between the tub and the pump, then you could have a clog in this area. If the washer does drain normally, then you could have a failed pressure switch, air pressure hose problem, wiring failure or a failed control board.
SOURCE: my washer was flashing F21
Hello, welcome to FixYa.
Based on your description specifically the door not unlocking combined with the F21 or as you stated "F21 & would not unlock" I'd suggest you check the pump filter and sub-components, i.e. back flow ball, drain hose etc.
Here's a link to my solution or explaination to guide you through checking these things. Typically this is associated with an error of F2, F21, or "suds" but not always.
http://www.fixya.com/support/r9090359-whirlpool_frontload_f2_f21_sd_suds
As for unlocking the door, it's a good idea to get the water out first, but in any event to do so is as follows...
Once you remove the service panel at the bottom, shown here (also shown in my "repair tip")....
...there is a manual latch release just below the lock latch assembly that you may be able to see visually or feel for by reaching up to the latch and pull the small "loop" below the lock...this is a image of what you'll be looking for.
Let me know how you make out or if anything is not clear and I'll try to help you moving forward in any manner I can. Good luck.
Please take a moment to rate the info and provide a testimony on my assistance and your experience here at FixYa.
Regards,
Macmarkus :)
To Manually unlock the door lock system:
1. Unplug the power cord from the outlet.
2. Remove the lower toe panel.
3. Reach up along the inside of the front panel and locate the bottom of the door latch assembly.
4. Located on the bottom of the door latch assembly is a tear-drop shaped tab.
5. Gently pull the tab down about ¼" or until a click is heard.
6. The door may now be opened.
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