cynthia, first to open your washer, here is a way to gain access to your washer if the door is locked shut.
1. Remove the lower panel under the door by loosening the three screws under the bottom edge on the front of the washer. HINT: If you prop up the front feet of the washer with some small blocks of wood, this will make access to the screws much easier.
2. With the screws removed, the lower panel should drop down then come off. If the panel sticks, a light tap on either side will knock it loose.
3. Reach your hand up inside the washer behind the front casing on the right-hand side. This is where the door latch assembly is located.
4. At the bottom of the door latch assembly is a small pull tab. This is the manual release for the door. Pull the tab straight down and the door will come open.
Sometimes these doors will not unlock for whatever reason. If there are no error codes being generated, this could have just been a momentary glitch. If you see "Fdl" or "Fdu" error codes, these are usually indications of a failed door latch assembly and will require replacement. You can also try to reset the CCU by unplugging the washer for AT LEAST 30 minutes.
Remember to place a tub or some other catch basin since there may be water in your washer. Once you got this accomplished, run a diagnostic mode on your washer and see what codes, if any, you get. There should not be a single F code, it should be accompanied by some other number or letter.
Also try to check the control locked led and see if it is on. Try using the Drain/Spin button to turn the control locked light on or off. If nothing is responding and the washer is not in control lock then most likely you have a stuck or shortened interface. You are normally able to reset this fault by pressing the pause/cancel button twice. You can then attempt to drain and spin the clothes by starting a drain/spin cycle. I would first pull the plug from the machine and let it sit for 30 minutes or better and then plug it back in. This should clear it as well. Download the service manual from here to investigate further. Hope this helps, good luck.