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Neff S4409N dishwasher makes a banging/knocking noise when operating. Its nothing inside the dishwasher...seems to be linked to the valve under the sink..?? Any ideas ? IAN D.

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If it knocks and bangs only when taking in water it may be an air lock in your pipes.

Posted on Oct 05, 2009

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Amana ARB8057CSR Bottom Freezer Refrigerator, Intermittent Quick Loud Noises Appliance history: Purch. 12/03. Replaced PTC relay 12/08. Water filter last replaced 3/10 (2-person household). Problem:...


No-one posted a solution. I contacted the original solution poster who was very helpful.I hope this helps someone else better understand their refrigerator problem and get on the right track. Staffgage.

Tweezb wrote:
"you are right that cleaning under your refrig wont get rid of a "compressor knocking" sound. what it might do is to lower the amount of heat from the condenser coils and thus cause less pressure and stress on the compressor making it run easier and less likely to bang or knock when shutting off.
if your coils were very plugged with lint and you have cleaned them, that will help but it wont "fix" the problem.
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"think that you are hearing either a freon related sound or even just the sounds of the unit going thru defrost.
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Hi,
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My dishwasher sounds like its working but when i open it nothing


1. No water
Make sure you get water to the dishwasher. Check to see if the water shut-off valve (located under the sink) is open. If you get water to the dishwasher, but there is still no water inside during the fill cycle, the problem might be with a faulty water valve (located at the bottom of the dishwasher, behind the kick panel, on either side), in which case replace the water valve.

2. Not enough water
If there is not enough water, the dishes would not get cleaned. This could be caused by a partially closed water shut-off valve (located under the sink), or a faulty dishwasher water valve (located at the bottom of the dishwasher, behind the kick panel, on either side).

3. Clogged spay arms
There is usually two, sometimes three spray arms in a dishwasher. Make sure there is no debris blocking the holes inside each spray arm.

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I believe this is a brand new dishwasher. Please listen carefully to determine of the sound you hear (clunk) is being made inside the dishwasher or is it being made near by. Most times, the problem is that the hot water pipe is baking the noise when the dishwasher closes the water inlet valve ... and the pipe goes "clunk"
I have not had an LG dishwasher make a clunking sound inside itself when the cycle changes. Also, because this dishwasher is so very quiet (well insulated) the pipe banging would be louder than something inside the Dishwasher.
If you have access to the hot water pipe, listen very near it when the cycle changes for the sound. Follow that pipe (hot water) pipe back and insulate it at the point it is banging. (or get a plumber to evaluate and resolve.)
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you need to check the inlet walve . when you start the unit you say it drains. so after the drain do you hear the water entering the dishwasher? If you hear a sound like a buzzing noise that would be the inlet valve working. if thats the case there is a clog at the screen in the valve not allowing the water or enough water in the tub. seeing that this is a portable unit you will also want to check to make sure the fill hose is not kinked up anywhere in the cabinet or under neath the dishwasher. If you hear no buzzing noise you need to check the inlet valve with a meter to first make sure your getting power to it and that the valve itself if good. check these things out and let me know what you found and we can go from there

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