The drum does not turn.

The 'flat black round rubber' part is a non return valve so that water can't flow back washer to spinner, or spinner to washer. That part needs replacing. These machines are not available to us in North America, but this link should work well for you.

https://www.google.com/search?q=Defy+twin+tub+800+parts

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Without further information, I can offer three possible issues:
1. The fill value is furred up and is not fully closing (diagnose this by turning off the water after use at the isolator valve - and if no water is getting into the drum overnight, then it is a filling problem and you needn't read on - as opposed to a draining problem in which case read on!)
2. If you have a long drain hose running along the back of kitchen units, perhaps it is running back into the machine
3. Have you installed anything else into the same drainage pipes - such as a waste disposal unit or another appliance - that may be pushing water down the drain so fast, that some returns into other connected appliances?
Good luck

It definitely sounds like the belt is stretched, worn-out, and in need of replacement.

With no water in the hopper can you turn the bowl and agitator turn by hand. If not easy to turn by hand the seal and bearings need replacing.

you may have a faulty water solenoid

It is most likely a hose connection from the pump to drain. What you could do is fill up the washer with cold water and color the water with food coloring let the washer rn thru a cycle. on its completion of the wash cycle and after it drains do not let it fill back up. Turn the water supply taps off and til the washer over on its front. With a tissue,(white), find the spot arond the connections where the color has dripped from. Repair that conection and with the washer back uprite run thru a complete cycle to test for leaks as well to purge the color out of the system. You either must do the later or run like h--l if the wife gets that color on her clothes. lol

you need to replace the water level switch

When error message 4E is displayed, you should clean the water hose mesh filter. To do this:

1. Turn off the water source to the washing machine.
2. Unscrew the hose from the back of the washing machine.
3. With a pair of pliers, gently pull out the mesh filter from the end of the hose and rinse it under water until clean. Also clean the inside and outside of the threaded connector.
4. Push the filter back into place.
5. Screw the hose back onto the washing machine.
6. Turn on the faucet and make sure the connections are watertight.


Also, please check the following:
• Make sure the source water faucet is turned on.
• Check the water pressure.

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check brushes in motor

It sounds like the water inlet valve assembly is letting a trickle of water thru when its not supposed to. It is located on the rear of the washer, it is the part the water hoses connect to. Make sure the power and water are turned off, then disconnect the water fill hoses. The valve is attached to a bracket, the valve will have 4 electrical selenoids on it and a hose leading further into the machine. Make a drawing of where the wires/colors were attached before you pull them off. The valve for that machine (MLG2000AWW or MLG2000AXW) usually costs about $45.00 to $55.00