Question about Viking DFUD042P Built-in Dishwasher

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Pump wont stop running turning power off doesnt help

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  • Viking Master
  • 2,605 Answers

Hello,
Welcome to FixYa.

Based on your post, it is likely nothing very serious, but the "resolve" requires some more investigation on your part.

**before proceeding turn the dishwasher power off via the home breaker panel, or unplug it from the wall if that is possible...most are hard wired to the home electrical...safety first**

The first thing to do is remove the toe panel/kick plate and inspect the base for water. If water is present, with the aid of a sponge, towels, or a wet-dry shop vacuum, absorb the water from the base...**it should be known that if you leave the unit for a few days, the water in the base will evaporate hence appearing as everything is fine again...if a problem/leak does exist it will return.**

If the unit works fine after resetting the power/breaker and soaking up any water present, it can likely be chalked up to a drain back-up or obstruction in the drain hose or pump...
(it could mean a faulty drain pump so you'll need to pay close attention the next few times you run it)

...If not, there are a couple of other possibilities that I'd focus on.

**Again insure power to the unit is off**

The first is the float and subsequently, float switch. If you've removed the service panel at the bottom, or toe plate, you need to locate the float and it's switch. It will be located directly behind where your main electrical junction is.

Once you've located the float behind the main connection plate, you should see something like this image below,

i.e.
pump wont stop running
turning power off doesnt - macmarkus_6.jpg

With the aid of a long screwdriver or if you can reach it, move the float up and down and listen closely for the switch to "click", indicating it is indeed functioning. Restore power again, and see if this resolves the issue, if not try this next...

The pressure switch too can cause the drain/outlet pump to run constantly ( and usually all the lights to flash or "F2"...depending on the era and model of the Asko...ones with displays show F2 and lights flash ).


As I was saying the pressure switch is the component which controls the normal fill level and the overfill detection...pre float activation. The float is primarily the last ditch safety to prevent disaster in the event of a overflow, back-flow, or leak underneath the unit to service or call for service to the unit.

It too is located under the machine and is mounted to the sump well assembly as shown, the large arrow indicates the switch while the small is the hose.
i.e.

macmarkus_7.jpg

The issue is possibly just the hose going to the switch is clogged with debris such as dirt, detergent buildup etc and will be remedied by blowing it out.

The best way to do this is to remove this hose at the switch in the location indicated above, be very careful as to not break the hose off with the part of the switch inside, they can be delicate.

I typically work it loose with a tiny screw driver gently working it away from the switch. Once removed, pour a small amount of hot water, white vinegar or "CLR" through the sump from within the tub...or you can try blowing it through with "lung power".

The other end of the hose is located at the back of the sump well and is quite vulnerable to blockages over time due to detergents, dirt, and such.

This is the location...do not break this or you will need to replace the entire sump well...no fun.

Large arrow is pointing back to pressure switch, small indicates connection to sump well, sorry for the poor quality...it's hard to get in there with a camera phone, ha hapump wont stop running turning power off doesnt - macmarkus_8.jpg />i.e.

macmarkus_8.jpg


Hope this helps move you forward, or even better resolves the issue altogether. Let me know of course, I will help you move further if necessary.

Good luck.

Regards,

Macmarkus :)

Posted on Mar 18, 2011

Testimonial: "You are awesome! I just had the cover plate off because water inlet had debris and wasnt getting enough flow to run. After putting it all back it ran a cycle fine then started with the non stop draning, so im sure that little hose also has debris. Last question can i fix it without pulling dishwasher out of cabinets. Tile in the way and would have to do major work to get it out Thanks again!"

  • 1 more comment 
  • waveslave492 Mar 18, 2011

    You are awesome! I just had the cover plate off because water inlet had debris and wasnt getting enough flow to run. After putting it all back it ran a cycle fine then started with the non stop draning, so im sure that little hose also has debris.
    Last question can i fix it without pulling dishwasher out of cabinets. Tile in the way and would have to do major work to get it out
    Thanks again!

  • Mark MacDonald
    Mark MacDonald Mar 18, 2011

    Hey, glad I could help.

    No you shouldn't need to remove it from the cabinet, it may be tight quarters to work under there, but it should be do-able for sure.

    In fact the only time I ever pull a dishwasher is to replace the main motor

  • Mark MacDonald
    Mark MacDonald Mar 18, 2011

    assembly or the entire tub.

    Just a note though, since you mentioned you had the inlet hose off prior to the pump run/overfill scenario, make sure that fitting to the valve is tight (but not overtightened) with no leak/dripping.

    Good luck and once again thanks.

    Regards,

    Macmarkus :)

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Posted on Jan 02, 2017

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