Get hold of a drain snake roll up your sleeves and get to work.
Can you use drain cleaner in washing machine.
If your washing machine drain is clogged one way to clear it is to use a commercial drain cleaner.
First things first in order to keep the drain clean you should pour some of those enzymes based chemicals at least once a month.
Check and clean the filter monthly or weekly depending on how frequently you use the washing machine.
The drain cleaner if used should be suitable for pvc drain piping.
Drano is a liquid or gel clog remover depending on the product you choose that works to dissolves obstructions in drain pipes including those of washing machines.
In general these products can be very helpful for minor clogs but have limitations when it comes to unclogging a completely clogged pipe.
Sludge in washing machine drain hose soap buildup grease oils and other materials on items that go into the wash can lead to nasty smelly sludge in the washing machine drain hose.
Add the quart of bleach and let the full machine run for one minute to mix up the bleach with the water.
However the real issue may be the drain from the house to the sewer have roots in it or a breakage thus restrict.
The solution works best on blockages caused by lint soap scum or dirt.
Remove the drainage hose from the washing machine and insert the snake down the drain pipe.
Open the top of the machine and let it sit all bleach y and full for an hour.
You could try that or use a snake to see if there is a blockage.