Anyway, you did not indicate if the washer does not do any draining ... or it just leaves a bit of water in the chamber?
No draining issue (no pumping sound):
Your washer could have a faulty drain pump and motor assembly, loose wire connection in the drain pump circuit or it could have a faulty machine control board.
Some draining issue:
It did not look like your washer model has a built in pump suction filter/strainer that is cleanable ... but there could be some obstruction in the pump suction or in the hoses after the pump. Straighten drain hoses and eliminate kinked hoses.
Watch video if you want to inspect the pump and hoses
well logically as superintendent you would be contacting the manufacturer of the machine and getting the details from them
or better still the land lord should be getting the details and passing them on to you or have the service agent come in and do the job for you as the cost is a tax deduction for him
Try unplugging the washer for 30 seconds then run a rinse and spin cycle. If it is still acting up you can remove the top panel and reach your arm down the front right side and find the door latch assembly. At the bottom up it is a pull tab. Pull that down and you will release the door latch. Image Whirlpool WP8182634 Door Lock Latch PartSelect
Give this site a try. Some guy on the forum had the Neptune issue and found a replacement seal. There are some how-to videos on YouTube(may not be your specific dryer, but same idea.) I'll let you have the joy of looking on YT.
There is a 2" L shape hose connected to that drain hole under. You can unclog it using a soft plastic stick. Stick it on to that hole do not force it turn the plastic stick while putting it in. Thare are 2 types of door gasket on that model one has hole in it and the other doesn't. If your original doesn't have a hole, the one that has a hole will work but there is a plug on to that hole.
Have you tried unplugging it for 1 hour? Yup surprisingly
that is one of the answers for clearing out fault codes on this machine. Sure hope that it works even though you don't have a code a full hard reset may do it.
Best to you.
If you mean your laundry sink, then mix 1 cup baking soda and 1 cup vinegar together and pour it into the drain. Let it sit in the drain for a few hours and then flush the drain with hot water. If you are tslking anout your washing machine you can buy a washing machine cleaner to get rid of the smell.
Try pushing down lightly on the lid and see if the spin cycle starts back up. On mine, the same thing happened because the small plastic pin attached to the lid was just barely long enough to push the switch that tells the washer that the lid is closed. The spin cycle will only run when that switch is pushed, i.e., when the washer thinks the lid is closed.