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get a plumber in to determine the reason for the hammer
if it is unavoidable have him fit an accumulator into the pipes to take the hammer out of the system
possible to change from quick stop taps 1/2 turn or ceramic taps to a tap that takes several turns to stop water flow but normally an accu,ulator fitted into the system will easy the problem
usually what happens here is that the pump to expel the water is not functioning, the normal problem here is a coin or hair grip gets lodged in the pump and stops the impeller from turning, generally the pump can be removed and opened up to remove the offending article and allow the impeller to operate again, once cleared of obstruction reassemble the pump and refit it. ( be aware, as the machine is still full of water, when you remove the pump the water will flood out so you need plenty of towels so soak up the water that spills.
Check inside the fill hose for debris. There is a screen designed to block debris from getting inside the machine valve. If the screen builds up with debris the water slows down. Sounds like the water is filling too slow. Also the unit and/or the load may not be balanced causing it to stop and drain out. If it's okay then see what lights are blinking when these events occur and post here.
Description of issue is lacking detail but... If the washing machine appears to be functioning normally but simply won't pump away the water then the possible causes, in the most likely order, are a blockage somewhere, a pump failure, or an electrical fault stopping the pump from running.
A different fault that could be confused with "not emptying water" is if you don't take the washing out until several hours later and find there is still water inside the drum. If the initial water drained out ok but then water seeped back in over the next several hours you could think you have a problem with the machine not draining the water when in fact it's letting water siphon back in or a faulty valve is causing water to seep in.
It could be the heater element, if the wash water does not reach the temp selected by you within a certain time period, the w/m could abort the cycle.
The pump or outlet hoses could be blocked and the w/m cannot expel the waste water between rinses.( This would be if the machine stops and is still full of water). Try running a cold wash cycle and this should confirm if it is the element as it will complete the cycle ok.
Hope this help
Turn off the hot water supply to the DW. Take a pot or pan. Fill the DW tub with COLD water, pump it out. Repeat this COLD water and pump out several times until the suds are gone. HOT water only makes the suds worse and prevents the pump from expelling the water.
We bought this dishwasher and ran it for the last 1 1/2 months and it made a grinding and whistling sound from day one (it's supposed to be nearly silent in its operation). Turns out the drain pump was cutting in while the machine was still filling, thereby emptying the wash tub of any water. Then, when the cycle proceeded to wash, the dumb thing had no water and made a horrible noise. So I had to pitch in at least 2-3 litres of hot water, and then it worked quietly! Had to do this every time there was new water intake.
After working with the repairmen - four visits later, we isolated the float assembly as the problem and they set about replacing the part. Turns out the two parts were markedly different. LG HAD INSTALLED an older model float assembly at the factory and it was the problem. The replacement part was the correct float assembly and things worked perfectly after that - thank goodness. No more babysitting the dishwasher.
Don't let anyone tell you the motor assembly needs replacement. I have seen that cop-out 'fix' all over the web. But use deductive reasoning to find out where the problem is in the cycle, and explore this option first - it's a quicker and cheaper fix than replacing the whole motor assembly.
'Mr. Float' as he is now called works like this: -expels any residual water in the tub from the last wash -intakes water for the wash or rinse -whirs 2-3 times prepping for the cycle -begins to wash, quietly -expels at the end of the wash or rinse.
He used to: -expel residual water -intake new water for wash or rinse ---drain pump would cut in WHILE still filling -machine would whir once, realize it didn't have enough water -perform a brief top-up intake shot -begin to wash and whistle and GRIND (this is where I would have to add the water) -expels water from wash or rinse, and start all over again.
It's a good dishwasher and it will work, but the right model parts have to be in place!