Question about Magic Chef 24 in. DU4500 Built-in Dishwasher

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Arm not turning, pumps water in and out, but no spraying the dishes

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When my wife started complaining about her dishwasher not getting the top rack clean this is what I found and I wrote a tip about it...

Dishwasher Spray Arms not Spinning


heatman101


Posted on Sep 08, 2010

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6ya6ya
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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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Water fills the bottom of dishwasher, lower spray arm still seems to turn/spray but no movement or water coming out of uppoer spray arm. We took apart the lines to see if there was blockage -- none.


If there is no blockage, your pump may need to be rebuilt or replaced. If your machine uses a solenoid valve to control weather the pump is washing or draining. The drain valve may be stuck somewhat open, diverting wash water down the drain. Or the wash valve may be not opening fully. Different machines work in different ways.

Nov 09, 2013 | Dishwashers

2 Answers

Not working


Good Afternoon heartbrea158, I am happy to assist you. If the dishwasher is not cleaning, typically, this is a sign that the water temperature to the unit is not warm enough. The water temperature should be at least 120f and no more than 130f. I advise turning the hot water on at the sink (or faucet closest to the dishwasher); allow the water to get as hot as possible. Are you using rinse aid? Use a rinse agent to increase drying and cleaning performance. When was the last time the filter was cleaned? If the spray arm can manually rotate, then another possibility may be that not enough water is being pumped to the spray arm. If you tap the delivery tube that feeds this nozzle and the water pressure jumps immediately; the problem lies either with the pump or maybe the impeller, for some reason the full flow of water is not making it to the upper spray arm. Should all basic troubleshooting measures fail contact a certified technician to narrow down the precise issue before investing in parts that may or may not be the root cause.

Aug 05, 2013 | Frigidaire 24 in. FDB126RB Built-in...

1 Answer

Dishes are always dirty, maybe even dirtier after running dishwasher. has hot water, lower arm moves.


Check the outlet holes on both spray arms for clogs. If necessary, remove the spray arms, clean out the holes and empty out any debris inside the spray arms. Verify that the upper arm is turning also.

If the machine does not drain completely at the end of the cycle, the pump drain outlet is partially blocked and you are retaining dirty water for the next load.

You may have a chemistry problem - inferior soap, empty rinse agent dispenser, or extremely hard water.

Improper arrangement of the dishes can prevent some from being washed. Make sure no dish blocks the spray to another.

Jul 23, 2011 | Dishwashers

1 Answer

Water is not coming up through spray arms


Sounds like the circulation pump is not operating, could be blocked with food or just defective. you would need to turn the unit on it's side and have a look at the pump from underneath.
Or you could just have blocked spray arms causing a blockage and not allowing water to escape through the holes. Remove each spray arm (there are 3 in total) and check and clean all the holes as this is where the water sprays out from to clean the dishes and glasses. When they are blocked you also get poor wash results.

Jan 26, 2010 | Frigidaire Dishwashers

3 Answers

If the lower and upper spray arms do not turn what could be the problem? I have a MDB4100AWB and I of course have hard water in our area and wondering what is causing the spray arms to turn.


could be the plastic shaft extension that screws onto the motor shaft to drive the pump. The threads on the plastic extension would sometimes get stripped out so that even though the motor is running, it isn't driving the pump mechanism. Assuming the dishwasher is filling with water and motor is running during the wash cycle. also check spray arm openings to make sure they aren't plugged up.

Jan 24, 2010 | Maytag 24 in. MDB4100 Built-in Dishwasher

1 Answer

Top rack does not wash dishes.


Possible causes of spray arm inefficiency:
Loading large or tall items in the lower basket which stops the arm revolving.
Upper spray arm split along seam.
Upper spray arm blocked.
Under dosing of powder causing foam and reducing upper spray arm water pressure.
Blocked strainers reducing water to circulating pump, therefore reducing upper spray arm water pressure.
inefficient wash motor impellor (faulty)

Dec 21, 2009 | Kenmore Dishwashers

1 Answer

Will not get dishes clean


If like you say the water pressure is good the water temp is good (120o minimum). The soap dispensor opens and nothing is blocking the arms from rotating then my guess is the unit is being overloaded. There needs to be space between the dishes so that the spray can hit the surface. Also, most folks know this but bears repeating... the dishes, cups, pots, etc. have to face down or angle toward the spray. I have seen people just throw dishes in facing up and then wonder why it doesnt get clean.

May 12, 2009 | Whirlpool 24 in. GU980SCG Built-in...

4 Answers

Dirty dishes


It could be a motor or a pump issue. The dishwasher has a motor that attached to a pump which forces the water up into the sprayer arms and during the drain cycle, it pushes the water out of the dishwasher.
The motor (and pump) located beneath the dishwasher.
Check if motor spins. In case it spins, the problem is with the pump ,in case it doesn't spin it could be a motor problem or a motor and pump problem.

First of all: filter plate clean? Clean any locked hole.
1) Can you remove the upper spray-arm and verify if holes inside are locked by any residus. Clean the holes , and check if pure water come out when you fill the center hole with some water.
2) Switch on the dishwasher , coldest wash cycle dish-washer empty and without the upper spraying arm. Once you hear water streaming in, open the door and look if a little water fountain comes out from the center hole where the upper spraying arm was fixed. If not, this canalisation is blocked and should be cleaned. Try to continue the wash cycle, often the water pressure will clean itself this canal. Check also lower spray arm: it should be rotating a while and ejecting water thru its holes. If not, verify this canalisation as well.

3) Put the spraying arm again on its place, verify also the sealing else water pressure is going down and spraying will not turn and spray water.

4) Again, continu a wash cycle, open the door and look; upper arm should be rotating and some rays trown out.

Hopefully, this helps .

If not, pump pressure may be low; have a repair verify, can be that only brushes in the motor must be replaced, can be the pump worn out and to be replaced at all.

Aug 12, 2008 | Asko D1776 Built-in Dishwasher

3 Answers

Top rack dishes have grainy particles on them after washing and will not come clean.


Run the dishwasher and observe the spray arm,if split it will spray water down: Also check water in tub, is it filling up sufficiently to get near the heater? If it has a upper spray arm does it spray water? If not you may have a clogged upper spray arm.

May 23, 2007 | GE 24 in. Profile PDW7800 Built-in...

1 Answer

Sprinklers not turning


if no water out of spray arms there can be two causes spray arms completely blocked. take them out and clean. pour water into centre hole and make sure it comess out of all the jets. turn on with spray arms removed and open door to check water is being supplied from the pump. if no water coming out, you may have a faulty pump or pump capacitor.access the pump and see if it is warm. if so fault may be the capacitor - a cheap part

May 09, 2007 | Candy CD623X Free-standing Dishwasher

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