[corkboy12]

Hi,

My dishwasher is not circulating water though out the machine. The water fills correctly and then the circulating pump comes on. However there does not seems to be enough pressure. I stripped down the pump, removed the heater and checked the pump by applying 220v directly and it works fine with plenty of power. I put everything back together and again all the processes seem to be working, but no pressure to the sprinklers.
I checked and during pumping there is the full 220 volts to it. (However I would say there is a noise from the pump). Any help would be appreciated. Thanks.

Colm.

[denman]

I cannot find any tech info on this unit.
But you said the pump gets 220 volts so I am assuming this is a non-USA unit and I do not have access to any info.

A common problem is the unit not filling with enough water.
Most units fill to just under the heating element.
This can be checked by adding a couple quarts of water after each fill during a cycle.
Just be careful to not overfill it.
If it now washes OK then check the fill valve.

Often if the fill is low you will also hear a growling sound because the pump will cavitate (suck in air).
The most common cause is a dirty screen filter on the input side of the fill valve. Remove the valve from the unit and clean/check the filter.
Do not permanently remove it from the valve as it is there to keep crud out of the valve which could hold it open and cause a flood.

If it still does not fill correctly I would replace the fill valve.

PS: Be sure to shut off the power and the water supply to the unit. Have paper towels etc. handy to wipe up any spilled water. Get a small pan/bowl etc. that will fit under the valve then loosen the input water line let it drip into the container emptying it as necessary. This will minimize the amount of water spilled.

[corkboy12]

Hi,

Ok, on this Dishwasher there does not seem to be any filter on any part of the circulation system. The water is sucked in from the side of the basin which is full of water. and should pass by the motor impeller and shoot into the sprays ?. The motor is still making a growling noise but feels like it is running and as mentioned it runs perfectly on the test bench, but not pumping in the machine. I assume I am correct in my assumption that the water fills into the basin, there is a pressure switch on the side of the basin which then indicates to the motor to start to run and circulate the water. The only other pump I can see is on the water extraction outlet. It does sound lie a motor problem. Any other things I could check ?

Thanks, Colm.

[denman]

Sorry but I cannot be very helpful on this unit as I have no info on it.

I have never see a unit that feeds the pump from the side or one that does not have a filter somewhere is the water flow path.
I was able to find some parts lists unfortunately I could not find a parts breakdown. The list did have a part called a sieve cover so there is probably a filter under the spray arms.

It could be that the pump works with no load but will not pump when it has a load on it. Could be it is toast.
When you had it out did you check that the impeller was solidly connected to the motors armature/shaft? Could be it is slipping on the shaft.