Question about Miele 24 in. G680 Built-in Dishwasher

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2 year old miele dishwasher runs without being turned on.

I have a G2430 Optima Series Miele Dishwasher. it is just over 2 years old. It sounds like the dishwasher is always running. Last week we received an F70 error code message. Took care of that and it worked fine for about 2-3 times now seems to run automatically w/o being turned on.

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Hi,
A F70 fault is the float switch in the base of the unit which is activated due to water in the base. you may have used too much detergent or the wrong detergent causing the unit to over sud or you have a genuine water leak. the continous running noise is the drain pump trying to remove any water.
you need to remove the bottom panel, turn the power off and dry up the water with a towel. then run it again and see if you can see a leak.
hope this helps

Posted on Jun 06, 2010

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I had Miehle tech out yesterday for continuous F70 codes. He could find nothing wrong. I suggested that he pull out the dishwasher for a look see. He kept insisting a soap problem and to not use much. I told him that we always used very little as my wife cleans the dishes throughly before placing them in the washer. He insisted it was a soap problem again and left. He could not recreate the problem.

I told him that he will be back. So today we again went to use the appliance and failure again. I called Miehle again. Told by the tech that took the call that it is a soap problem,,,,,must be in their script.

I told him that likely a failed seal or hose and that dishwasher should be pulled out for a look see. He proceeded to tell me that if it did not fail while their appliance repairman was onsite, there was little that they could do. I suggested then that they replace the dishwasher.

He then told me that a repairman will be at my home again tomorrow between 8 and 5,,,,,which means I get to stay home all day again tomorrow.

I then find this site that gives a dozen possibilities besides a "soap" problem,,,,most of which means pulling the washer forward for a look round back.

Oh yes,,,,my hobby and sport is rebuilding and showing classic cars and riding and repairing my motorcycles,,,,so it's not as if I just fell off a turnip truck when it comes to mechanics,,,,,,it's a dishwasher for god's sake.

So tomorrow we will see what's next,,,,bet it's again a "soap' problem.

Posted on Dec 30, 2011

  • Roger Schwaf Dec 30, 2011

    Appliance repairman was onsite this AM. As we were discussing the situation, I happened to mention to him that all had been well for 3 years but was now failing. Told him that I had removed top "basket" in order to cleanse the electronic filter element from our Honeywell furnace filter system. I had to remove "basket" for sufficient room to allow this unit to sit properly in the dishwasher.

    This set off a light in his head. He told me that he had seen the exact problem a couple of weeks earlier while working on another customers unit.

    Turns out that if you remove the top basket, you are also disconnecting the internal propeller that forces water to spray around the dishwasher. This propeller is powered by water pressure that comes from a 1/2 inch tube from the washer itself. When you remove the "basket", this allows more water to fall into the dishwasher and thence overflows into the "tray" at the bottom of the dishwasher,,,thereby raising the plunger setting off the F70 code.

    I had mentioned to the online support guy at Miele, my wife had mentioned to the tech that came out a couple of days ago, and both said of no consequence. The only reason that the tech that was here today, was that he had observed this same phenomenon a couple of weeks ago.

    In his standard testing the machine was working fine(some of the water from yesterday had evaporated) so the plunger had fallen thereby no F70 code. We then removed the top "basket" and run a cycle as the tech observed with a flashlight under the dishwasher.

    In short order, he was able to see water dripping into the overflow pan.

    Problem solved in my case. The tech will notify Miele to post this observation to their technical suppport staffs and engineering.

    The reason that i had told all 3 techs of removing the "basket" was that the machine had functioned properly for 3 years,,,and it was only when running with the "basket" removed that F70 was noted. I thought possibly a safety switch issue,,,but turns out that was just excess water because of removing basket and the machine could not handle it all without a bit of overflow.

    Someone once said: "When you hear hoof beats think horses, not zebras" I had felt strongly that somehow removing this "basket" after 3 years of all ok,,,,was somehow related. LIkely not a common occurence to remove the "basket" so this is why Miele was not aware of this solution.

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