Miele Dishwasher Issues

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The Automatic adjust setting is for people washing dishes with very little soil overall, but that soil being hard to remove (people pre-rinsing dishes before washing, basically).

In those cases, the optical sensor would read no or very little soil and select a very short, gentle wash cycle and thus fail to remove the soil that is there.

The adjustment setting thus changes cycle behaviour to run more intensive regardless of soil sensed.
The "max" cycle variant is the same though - it's just more easy to trigger.
BSH has a similar setting now, and in some literature that setting has been recommended for eco DW detergent aswell to counter it's weaker cleaning power.

Some people who run a lot of low soil washes but with stains like tea or coffee like that setting aswell as the tendency to higher main wash temps helps with bleaching those stains away.

On my G7000 series and if I am not mistaken the G6000 series aswell, the prewash on Auto is cold.
Load size sensing happens in the first few minutes and IS NOT repeated if it decides to run a prewash, aka drain and refill.

3.8L for the prewash isn't outrageous, maybe a little on the high side.
And an initial fill of 3l for the main wash is correct aswell, with maybe some refilling, though unlikely.

About 5min into the mainwash, not long after the detergent is added, heating SHOULD start.

Given where your machine appears to keep adding water is where it should start heating.

Which is totally in line with the fact that that pressure switch is used as a heater safety.
The machine behaves normally, then it wants to heat. It trys to heat, but the pressure switch says the water level is to low (even if it isn't).
The machine trys to rectify the issue by adding water, causing the way to high water usage.

A normal pre-wash, wash, rinse, rinse used between 12-14l.
Regeneration of the water softener could add another 4l.
Adding 6l ontop of that for 2 heated fills gets you to about 24l, right where you report it to be.

That makes me very confident in the diagnosis.
 
Have you been playing with the settings on the machine, prior to this starting?

I increased the water level on our G6905 and it’s now using 15-25l on a sensor wash. So I’m just wondering whether you’d made any configuration changes prior to this change in consumption. 25l seems to be the upper limit, I’ve never seen it go above that.
 
Tom

Is the first service menu for service parameters and the second one for the programming menu?

I have a 6987(USA model) and the only time it started taking about 22 liters of water for a program was when I switched detergent to Cascade Action Pacs. The suds in the detergent caused the machine to draw water several times during the wash, interim rinse, and even the final rinse. Changing detergents returned the usage to normal.

Really hope your new part will solve this problem.
 
Hey Brisnat81 - I haven't changed any settings on the machine - I only found out how to access the service menu after the machine started playing up to read the error codes. The increased water level setting is turned off.

Jerror_Si - it could be - one menu has the component and switch tests, and the other has the increased water level and increased water temp.

I've been using the same dishwasher detergent since before I got the dishwasher, and as far as I know, the formulation hasn't changed. It's low foaming and clean rinsing.

I took a picture whilst it was mid-wash last night, it's definitely heating up as the water is hot, but you can see how much water is in the bottom.

tomwasher81-2023021908113804994_1.jpg
 
Wow

Yes, that is a lot of water since it normally only covers the filter area. It's got to be something that is making the machine think it needs to add more water so I Hope the replacement part will fix this problem.
 
Water softener

Could the water softener have malfunctioned, or been perhaps mis-adjusted by the user?

On my Bosch (circa 2004) it says in the manual that higher settings of the water softener will cause water consumption to increase.

Which brand of detergent are you using? Some do create excess froth, which causes the machine to keep topping up.

Have you tried running a Dishwasher Cleaner (the liquid in bottle version) through a cycle or two?
 
The higher water usage with higher water softener settings is due to the more frequent water softener regeneration cycles.

The water softener has to be flushed after a certain amount of water has to be softened.
The harder the water the more frequent that happens.

For example, our old BSH DW had to run a regeneration each cycle with the extremely high water hardness at my parents place.
My DW here only runs a regeneration cycle every 4 cycles or so.
Both machines used about 4l for the regeneration - but since that water contains lots of minerals, its just drained immediately.
 
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