See if the water in the dishwasher is too sudsy. If it is very sudsy, cancel the washing cycle and drain the dishwasher. The pump will drain water for 3 minutes. In case the pump cannot drain the water, remove it by hand, using some cloth or water hoover. Examine the detergent dispenser carefully for any damage and replace it if you can see any defects. When using a dishwasher, add exclusively specialized detergents designed to be used with dishwashers. If you use regular washing up agents in the dishwasher machine, they will cause redundant soapsuds formation. If soapsuds are within the normal parameters, check if the water in the dishwasher tub is at the necessary level. The low water level may cause the air in the drain pump. If the water touches the bottom of the mushroom float, the water level is correct. Once you have found the water level lower than that, check for some bowls or other containers in the tub. They could have flipped over into it during the washing cycle and now are holding the rest of the water. Load the utensil back into the rack and check if they sit securely in place. In case you cannot find any utensils in the dishwasher tub, it is the water inlet valve that causes the low water level. Disconnect the dishwasher from the mains to cut off the power supply and turn off your water supply system tap. Remove the water supply hose, disconnecting it from the dishwasher water inlet valve and see if its filter screen mesh is not clogged. Replace the water valve if the screen has clogged. Debris from the clog can get into the dishwasher water valve body and block it, preventing it from closing or opening. In case the filter mash is clean, place the dishwasher hose tip in any container and turn on the water supply tap to see if water flows freely through the hose. If no water flows into the container, check your water supply system. In case the water flows normally, examine the wirings leading to the water inlet valve. Connect all loose wires back in place or replace the entire cable harness if it is out of order. If the cable harness is fully functional, it is the water inlet valve that needs replacement.