Bosch Dishwasher - Clean Metering Tank?

[dishman]

@JEBski

It is an anti flood valve. If it had failed I would expect it to either fail or not. No in-between. It may have just needed a reset. It could also be that during your repair the leak tray still had some water in it which was sending a false leak signal. If that had then evaporated, it would run as normal.

For further explanation. This is what the anti-flood hose does.

 

[Tom1673]

I have the exact same problem - did you manage to fix this?

I've removed the plastic matrix, there are two plastic components on the inside left of the dishwasher one near the base and the other half way up. Once removed you can also unclip the metal clip on the water inlet and disconnect the grey wire. It should then just pull out of the other hoses. I've cleaned it but can still see gunk around the black float at the top left. I also have the orange stuff - no idea what that is?

 

[Tom1673]

Hi there
just a quick question the two fittings you said you removed from inside the dishwasher on the left had side to get the tank how how are fixed in couldnt see any screws thx in advance

 

[dishman]

Can you circle what you mean on an image?

 

[ukjoel25]

Encountered this problem today. with a Bosch series 2. It was 27 months old and 3 months out of warranty......

Our previous model last 7 years and this one has been fine until today when we had the flashing water light....

I could see on youtube the possible issue and once i had removed the side panel it was a textbook example of a serious clog. (identical to pics in original post)

My big problem was that Bosch have changed the design making it much harder to remove the matrix. (I think thats why some of the above posters have found it easier to remove than others)
In the end i took it into the garden and managed to unattach the outlet hose (which was the only one to come off easily)

Chucked a bottle of dishwasher cleaner in the now upside down dishwasher, which did a little in terms of moving the gunk, and then put in some bleach which sorted it out in under an hour. Then rinsed it out with a hose and connected it back up and its running fine.

I suspect part of the issue is design and part of the issue is hard water (Hampshire) and part of the issue is the wife insisting on using eco wash which I suspect is too cold to properly dissolve the tablets....

 

[foxhole]

Have a Bosch and was getting a build up of grease etc on DW so started adding tiny amount of wash up liquids to each wash , now find it prevents grease build up and is slowly dislodged existing.
The dishwasher cleanings seem to do very little in the way of removed grime build up , have stopped using them .
The filter has gone from needing a total clean every day to less than once a fortnight .
Typically do 4-6 loads a day .

 

[jason_guo]

the orange color staff is water softener salt. don't have to touch it till more than 10 years.
but i have same problem, it is so hard to remove the two connection with the wall of inside. it seams that we have to build a special tool to screw them. otherwise it is easy to damage the plastic parts.

 

[Cheryl Prax]

Thank you so much for this. I fixed my 8 year old Bosch D/W with no parts. I originally thought the E14 error meant I had to change the sensor. When I took the machine out I saw all the gunk in the matrix and decided I needed to clean it out. I had trouble understanding how I could take the matrix off. I read the comments re the two components inside the dishwasher on the left wall that had to come off. (The grey water inlet at the bottom and the big dryer exit). However there were no instructions on how they came off. I found another video on 'How to replace a drain hose' which showed they had to be screwed off just by twisting the parts. https://www.ransomspares.co.uk/dish...w-to-replace-a-drain-hose-on-a-dishwasher.htm. I cleaned the matrix as well as I could but could not get all the gunk out. The sensor switch looked okay so I put everything back together and the program went fine until the end when I had an E15 - leak. I had accidently kinked the black washer round the dryer hole, plus maybe water from the matrix (when removed) had spilled into the water sensor underneath. I re-situated the washer and tipped the machine 45 degrees to the right to get the water out (should have been backwards?) but that seemed to fix it.

 

[Unclemonkeyman]

Just spent a few hours googling how to do this, so thank you. The matrix is now soaking in the bath with soda vinegar and bleach, hopefully I'll be able the free some of the gunk.

 

[Unclemonkeyman]

 

[Unclemonkeyman]

Managed to get most of it out but like a newb I broke the relay trying to dry it... Very fragile.
I have a new one in now but I guess I need things to dry out, I had to tip the machine to remove any standing water as I was still getting the e15 code, that worked but after about 30 mins washing the power tripped. So I await for it to dry out there's probably still some water somewhere.

 

[akassabov]

I have a Bosch integrated dishwasher (SMV50C00GB) which is about 5 or 6 years old.

It completes the cycle perfectly but we have a small amount of water that ends up under the dishwasher after every cycle (i.e. in the tray that also contains the anti-flood float and switch).

I have traced it to what appears to be the overflow in the metering / fill tank, on the left hand side of the dishwasher. There are 3 areas of the tank that look like they have filled up with 'gunk' and I think this is what is causing the overflow to be in use - albeit it's only a couple of teaspoons worth of water per cycle.

So, rather than buy a new dishwasher, which seems rather OTT to fix this (!) I'd like to perhaps try and remove the metering tank and attempt to clean it out.

I have added some photos below.

1. Metering tank. Overflow is on the left side of it.

2. Upturned 'U Bend' (waste flows right to left) showing the 1st blockage (above it).

3. 2nd blockage - higher up

4. 3rd blockage (small).

Is the metering tank something that would be cleaned/unblocked sufficiently if I use a good dishwasher cleaner liquid/powder on a full cycle? We have never used cleaner, nor any salt, since our water is quite soft. Would it be wise to start using salt?

If I want to remove the tank to try and clean it, it looks like there are a couple of retaining clips either side (grey clip on picture 4 above) which would need releasing after pulling out the drain and feed hoses (O-ring seals)? Is it common to remove this tank and refit it easily? What's the best way to clean it thoroughly and remove all the blockages?

I've also noticed a lot of crystallised orange material in a larger tank underneath - shown in this photo - is this normal?

Any help would be much appreciated - I'd rather not buy a new dishwasher because of this, but will do if there is too much to sort out (the tank containing the orange stuff looks impossible to get out, for example!).

Hi everyone,

I’m new to this forum and want to thank everyone for their input on the issue, especially daveb99.

My family’s dishwasher (SPX25CX00E/64), which is exceptionally well preserved and has been used no more than a dozen times since we bought it, came up with this problem after moving it from one place to another. The tap water error symbol wouldn’t quit flashing whenever we turned on the machine or, in some lucky cases, got to run for about half an hour until it came flashing up again. My pops and I narrowed it down to the left side tray in Daveb99’s pictures, filling up the bottom with water whenever the machine was running, which caused escape down to the water leakage detector.

What you need to do, in this case, is to:
1. Dismantle the matrix
2. Remove these plastic caps and rubber gaskets
View attachment 326479
View attachment 326480

3. Dry out everything
4. Put back the gaskets and place the caps by firmly pressing them in until you hear a good click
View attachment 326481

5. Mount the matrix back

You can visualise the steps by following this video:

This, however, did not fix the problem, as there had been accumulated water underneath that was causing the detector to trigger anyway as we began testing the dishwasher again. Shaking the machine sideways by tilting it 45º and letting the water build-up leak out is crucial. If this doesn’t help you resolve the water tap error on your machine, try dismounting the bottom frame so you can reach the flood detector, following the steps shown in this video:

Hope this helps