Help needed E4 comes up and no waters coming through

Hi Lina, accordin to the Haier website, E4 stands for "water inlet problem. Water can not inlet or cannot reach the selected level in a proper time.". Unless the ingoing water pressure is really low, I think you need to service the machine. Anyway, hope this helps!

the unit is not draining properly. unplug it from the current outlet, check behind there should be two places to drain the machine. unplug the two drain plugs in the back and let the water empty out. the e4 error message comes up when the unit is filling up with water.

E4 error indicate an abnormal water level which means too much inlet water (E5 also is refer at this fault).

I quote other comments/solution about this same error:
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I had the e4 error code and i took the outer panel off and inside behind the power button is a grey reservoir tank which measures the water that goes inside the dishwasher which actually got bunged up with **** and grease causing the floaty thing to get jammed and cause the e4 code to come on which means abnormal water level the top to the reservoir just unclips on both sides then just clean all the gooey stuff out and put it back together it worked for me.
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Good luck.

I found the solution myself. Underneath the machine, there is a plate. On the plate, there is a float and a microswitch, when the water leaks onto the bottom plate it raises the float and activates the microswith which shuts down the machine and shows E4 on display. To get rid of the fault, you have to pull out the dishwasher, then tilt it, and drain the water from the bottom plate. Also make sure that there is no leak in the internal piping, if there is, the fault will come back as soon as the recess in the bottom panel fills with water.Hope it helps.

I found the solution myself. Underneath the machine, there is a plate. On the plate, there is a float and a microswitch, when the water leaks onto the bottom plate it raises the float and activates the microswith which shuts down the machine and shows E4 on display. To get rid of the fault, you have to pull out the dishwasher, then tilt it, and drain the water from the bottom plate. Also make sure that there is no leak in the internal piping, if there is, the fault will come back as soon as the recess in the bottom panel fills with water.Hope it helps.

There is a water holding tank on the right lower side (when u are looking at the front), empty it and the unit comes back on.

I have a Kenwood Kdw8st2a and have been constantly plagued by the E4 overfill error.

Lifting the front of the dishwasher and tilting it backwards seemed to clear the E4 error only for it to come back after the next wash.

I found eventually that the connection to the U bend under the sink was too narrow and was almost blocked hence the dishwasher was not emptying properly.

I disconnected the dishwasher waste pipe and ran the waste into a bucket for about 6 cycles and it worked fine.

Eventually drilled through the kitchen wall and fitted a lower direct waste pipe to the drain. Overkill maybe buit it hasn't done an E4 since.

OK this should not happen. It might be that the connectors to the watervalve is lose. E4 is a sign that the watervalves are closed. You should contact the store you bought it from and have them give you a replacement. Do not open it for now as it will void your warranty. You know it is not the pressure as the other never had this problem
This however is the link for all the parts you need. or might need.
LINK
Have a good one and good luck changing this one out and please dont take no for an answer

This error message is because the water tank is full. Just empty it out and put it back in and the AC will start to work again. If that doesn't work then I don't know what the problem is, but I just had the E4 error and did that and the problem was solved.