Question about Hoover 24 in. DT999 Free-Standing Dishwasher

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Leak from salt reservoir on the DT999

Hello, our dish washer is leaking quite badly. I have removed the side panel (right hand side) and there is a plastic part, that runs on the outside from the side of the machine, into the top right hand side of the salt reservoir via 3 outlets. Each outlet has an O ring to connect up to the reservior on the bottom. It was leaking heavily, so I cleaned the connectors and the O rings and have put petrolium jelly on the rings. When you turn the machine on, it still leaks. There seems to be tremendous back pressure and water flies out past the O rings. I can't see any blockage in the salt reservoir, is there a pump or something a little bit past this that might have failed? I can't find a schematic to work out the flow through the system. I wonder if you can help. Cheers.

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  • sploid Mar 05, 2011

    Thank you both, you were spot on.

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Replace water softner seals (Hoover spares reference: 91941698) as stated previously. Harraps were doing them for £6 each. The softner is accessed by removing the R/H panel and unscrewing the air break ring nut from inside the machine. They are not a standard size so oem o rings are recommended.

Posted on Sep 08, 2009

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My name is Peter. I am a retired field service appliance technician.

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25336251-w5dwgjlsyg40kgwhpbl31abv-3-0.jpg
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Always follow the manufacturer's instructions and read the directions carefully on detergent, rinse aid and salt packaging.
Cleaning your machine about once a month will remove any grease and lime scale deposits which can build up on the inside of the machine. Special dishwasher cleaning detergents are available which are used when the machine is empty. These cleaners will often leave a fresh smell in the dishwasher too. If you want to have that fresh smell all the time, use a dishwasher freshener. These are usually supplied as hanging tags, which should be carefully positioned away from any moving arms. A freshener is essential if you load during the day and then run the machine at night.
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WHAT ELSE CAN I DO TO GET THE MOST FROM MY DISHWASHER?
Cleaning your machine about once a month will remove any grease and lime scale deposits which can build up on the inside of the machine. Special dishwasher cleaners are available which are used when the machine is empty. These cleaners will often leave a fresh smell in the dishwasher too. If you want to have that fresh smell all the time, use a dishwasher freshener. These are usually supplied as hanging tags, which should be carefully positioned away from any moving arms. A freshener is essential if you load during the day and then run the machine at night.
LOADING

These items can be washed in a dishwasher, with the following guidelines:
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Cutlery - Stainless steel and silver cutlery are normally suitable for machine washing, but it pays to rinse off any acidic food before loading to prevent any corrosion and, if possible remove the cutlery immediately after the cycle, to avoid prolonged exposure in a humid atmosphere. Do not mix steel and silver cutlery in the same basket and wash bone or wooden-handled items by hand.
Plastics - Check whether they are dishwasher safe and do not place in the lower rack, where the heating element may affect the plastic during drying.
Pans - Stainless steel is ideal for dishwashers. aluminium can be washed in the machine, but may discolour during the rinsing. If in doubt, remove aluminium pans before the rinse cycle.
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We had this problem with our machine.
There turned out to be a few things that caused it:

- Firstly, the float assembly (an orange looking float in a little chamber, visible if you take off the left-hand panel of the machine) was clogged - we cleaned this and it seemed to help.
- The heat exchanger matrix was full of debris - we tried to clean this but ended up damaging it and bought a new one.

.. these two things seemed to improve the cleaning and the machine worked for a while.

The real problem though (which caused it to pump out continuously) turned out to be a failed seal on the circulation pump.

If you look on page 4 of the following link:

https://www.neff-eshop.com/eshop/neff/gb/prodp.htm?eShopType=S&prod=S5456X3GB%2f22

.. you will see a diagram of the bottom of the machine - the part that failed was 171598, which you can see on the bottom middle-to-right hand side of the picture..
The rubber had perished very badly, and it was causing water to leak into the bottom of the machine, which triggers 'flood mode' whereby it pumps continuously and doesn't actually wash the dishes.

The part costs about £5 - fitting it is not straightforward though, as you need to strip the machine down which is a pretty involved job.
If you think you're up to it, the steps I followed were:

- Remove both side panels
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- Remove kick-panel under the front door
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- Remove the two screws at the front of the machine which connect the top of the machine to the base (these are quite low down, near the door hinges).

Now, you should be able to lift the top of the machine off the base, and will have access to the pump etc.


... re-assembly is the reverse of disassembly ;-)

This took me a couple of hours - it might be better to find somebody who will do it for you for fixed cost as it's a pig of a job.


For what it's worth, there seemed to be very few places where the machine could leak - and this looked to be the major one - and there are a few push-fit pipes which are worth checking out too.


Hope this helps somebody.





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In order the change the hose, you will need to remove the left side panel, and the bottom panel, and this will give you access to the entire hose....

Hope this helps!

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