NEFF Dishwasher not dissolving the tablet

54and56

The Red Ace wrote: »

JsJ sorry to hear these guys are basically putting you off without seeing the dw, , there is a small cam motor in the heater assembly which diverts the water flow to either the top or bottom spray arms one at a time thus allowing the dw to operate with a low volume of water but it is the same circulation pump which does all the pumping, you could take off the bottom spray arm and look down with a torchlight, if the pipe looks as if it has a blank end run the machine for a few minutes, if the cam motor is working the rotating cam should move and the next time you check it the opening should look different, if it hasn't moved there is a failure of the cam motor but the amount of times this happens as against blockages within the impellar of the circulation pump is rare. if your dw isn't integrated it should pull out of the kitchen unit fairly easily

Hi Red Ace, thanks so much for the follow up. Your explanation makes total sense. I'll have a peek into the lower spray arm pipe as you suggest.

Unfortunately my DW is built in so I'm reluctant to star pulling it out, I'll likely do more damage than good.

thebeeb

A heating element was suggested earlier and a pic was put up of the tablet stick in between dishes in the bottom rack. So can we establish if its heating or not. Put on a quick wash in the dishwasher. Position both spray arms so that they are perpendicular to the door. Wait 10-15mins open the door, the water should be hot. Now take note of the spray arms, did they rotate?

54and56

thebeeb wrote: »

A heating element was suggested earlier and a pic was put up of the tablet stick in between dishes in the bottom rack. So can we establish if its heating or not. Put on a quick wash in the dishwasher. Position both spray arms so that they are perpendicular to the door. Wait 10-15mins open the door, the water should be hot. Now take note of the spray arms, did they rotate?

Thanks thebeeb, I did a similar exercise last week but only waited a minute or two. I'll put on a normal wash later, position and photo the spray arms and then open it 15 minutes in and take another photo.

FWIW I actually got a plumber to the house this morning on an unrelated matter (fitting some new taps in bathrooms) and I asked him to check. He confirmed the DW is receiving supply from the mains and there is strong mains pressure coming into the house but he wouldn't touch the DW in any way. He's been burned a few times trying to help people and it turned into something he's not qualified to address which I do respect.

I'll see what the upshot of the new test is ref the spray arms and heating element and if NEFF won't send someone out I'll just have to call out an independent engineer to diagnose and fix it.

thebeeb

Je_suis_Jean wrote: »

Thanks thebeeb, I did a similar exercise last week but only waited a minute or two. I'll put on a normal wash later, position and photo the spray arms and then open it 15 minutes in and take another photo.

FWIW I actually got a plumber to the house this morning on an unrelated matter (fitting some new taps in bathrooms) and I asked him to check. He confirmed the DW is receiving supply from the mains and there is strong mains pressure coming into the house but he wouldn't touch the DW in any way. He's been burned a few times trying to help people and it turned into something he's not qualified to address which I do respect.

I'll see what the upshot of the new test is ref the spray arms and heating element and if NEFF won't send someone out I'll just have to call out an independent engineer to diagnose and fix it.

Put on a QUICK wash not a normal. As in a quick wash it heats straight away.

You would be better off getting an independent engineer as NEFF will cost a fortune if u wanted them to call out.

54and56

thebeeb wrote: »

Put on a QUICK wash not a normal. As in a quick wash it heats straight away.

Will do.

thebeeb wrote: »

You would be better off getting an independent engineer as NEFF will cost a fortune if u wanted them to call out.

€95 call out + parts is what they quoted.

54and56

thebeeb wrote: »

Put on a QUICK wash not a normal. As in a quick wash it heats straight away.

You would be better off getting an independent engineer as NEFF will cost a fortune if u wanted them to call out.

OK, put on a quick wash but before I did I took the following pictures:-

As Red Ace suggested I took off the bottom spray arm and took a picture of what was down there, here it is



I then lined up the two spray arms to point in the same direction and turned on the DW to a quick wash cycle with a fresh detergent tablet in the dispenser. Here's the photo



I then let the machine run for 10 minutes and opened it. There was loads of steam and loads of hot water being pumped out of the spray arms which quickly stopped but unfortunately the spray arms themselves were in EXACTLY the location I'd started them in, here's the photo



You can also see that the tablet had been ejected correctly from the dispenser but hasn't dissolved much and is sitting on the base/floor just under the spray arm.

For completeness here is the lower spray arm pipe after the wash



I guess this means there actually is a problem with the pump?

thebeeb

Since it is heating, red ace is correct. As both the spray arms aren't rotating, theres a problem with the circulating pump. Could be an expensive fix im afraid.

wiz569

Seems to be the same problem,might help if you decide to do it yourself

http://www.justanswer.com/uk-appliance/2m4wq-inbuilt-neff-dishwasher-drains-fine-when.html

54and56

wiz569 wrote: »

Seems to be the same problem,might help if you decide to do it yourself

http://www.justanswer.com/uk-appliance/2m4wq-inbuilt-neff-dishwasher-drains-fine-when.html

Ha, no chance of me doing that myself, not in a million years!!!

Bit depressed that of all the things it could be it looks like it's the most expensive thing possible

Any idea what the circulation pumps will cost? It looks like I can get a new replacement machine delivered and installed for between €500 and €600 from Power City.

Je_suis_Jean

Je_suis_Jean wrote: »

Ha, no chance of me doing that myself, not in a million years!!!

Bit depressed that of all the things it could be it looks like it's the most expensive thing possible

Any idea what the circulation pumps will cost? It looks like I can get a new replacement machine delivered and installed for between €500 and €600 from Power City.

A replacement pump will be a lot less than that, that's for sure.
A quick google is returning prices in the €200 range for the pump + fitting.

The Red Ace

JsJ as a last throw of the dice try this, remove the top and bottom spray arms, this will give the pump free flow, set it for a hot wash and if you are lucky it may spit out whatever is restricting it, btw the pump is ok as you have already said you have seen water coming out of the spray arms, even if it needed a rebuild of an impellar and seals kit are c 70 euro, the most complex part of fixing this is the base has to be removed to gain access, they are just different to all the other dw/s

ellewood

What does it sound like - does it sound like it did before it started acting up? or does it sound like its under pressure als does it vibrate/shudder?

Like someone else said its doubtful if it is the motor (unlike the whirlpool alright) the most likely cause is something restricting/blocking the impellor in the wash motor or the pipes leading/coming from the motor - most likely just take out, clean and put back together will sort youre problem

54and56

Hi all,

Got the NEFF engineer out yesterday. He changed a water inlet sensor (wasn't filling up enough?) but also identified a blockage / build up of grease in the system somewhere which the filters hadn't prevented. He dosed the machine a few times with a large syringe and loads of dirty water with black bits came out.

Machine works perfectly again.

€115 all in and no circulation pump required .

Thanks to you all, particularly Red Ace, for the steers you gave me. I'm far more knowledgeable now on how the DW works but also what needs to be done in terms of pro active maintenance to prevent such a build up in future.

Cheers all.