Siemens SN66L080GB Integrated Dishwasher – help needed on access to drain pump

[glastolover]

I have a Siemens SN66L080GB integrated dishwasher, 6 years old. Have an E25 error, which means it won’t drain. Have had a few times before and cleared by cleaning out drain pump impeller, put back together and all been fine, but this is not working this time. Impeller is spinning freely, but this time when I try it again, it just makes a horrible noise when the drain pump tries to run and throws the E25 error

Wondering if I need to replace the drain pump… have taken the right hand side lower metal cover off, and I can see it, but not sure how you get access to remove it… there is no space through this way. I first thought there would be a bottom cover to remove, but doesn’t seem to be the case. Now thinking maybe I have to remove the lower front panel, but not sure if I have to take the door off… can’t even work out how to remove the “kitchen cupboard” door at the moment either!

Have been looking for a maintenance manual on how to get access to this pump, but not found one yet…

Any help from experience to confirm how to get to this pump would be massively appreciated, thanks!

[electrofix]

sounds like you may have a piece of glass in the impellor

try running the pump with the pump cover off. dont let the unit fill. am hoping that the glass, if thats what it is will be flung out

if not get all water out from round the impellor and go digging with a torch and a long thin screwdriver trying to find it

Dave

[glastolover]

OK… intriguing? What makes you say that? The sound it makes when it tries to run is kind of a nasty mechanical whir… I am thinking the motor is burnt out, but maybe not. I have dug around with long tweezers, will try again. But as I say, the impeller is spinning freely, not stuck.

For running it with the cover off, how do I run it without letting it fill, and why do you say do that?

Thanks a lot!

[electrofix]

if there is a peice of glass in there you want to let the impellor spin and chuck out the glass. With the cover on the glass is lifted by the water but catches on the cover causing noise.
there has been lots of times i had to really look to find the glass as its clear and you cant see it very well

if the unit fills up the impellor wont throw it out as far as you pushing it up into water not air

programmes do a pump before fill. if it starts to fill open the door and cancel the programme. after each trial look to see if anything has been thrown out

Dave

[glastolover]

Well I tried it. I think the pump was spinning (this time in air with the cover off), tried it several times, but nothing came flying out. I got my tweezers in again, and it is now all cleaned out to very spic and span! Unfortunately, when I put the cover back on and filter back in, run a rinse cycle I just get exactly the same thing… runs to the end, fails to drain, E25 error.

Anyone got any other ideas? Or can anyone advise how to remove the drain pump to have a closer look at it?

Thanks!

[electrofix]

if the drain pump is spinning and its not draining its unlikley to be a pump problem the only thing that bothers me is the noise you say you have

i would be looking for a blockage in the outlet hose. have you checked where its connected or is it pushed too far down a stantion pipe ?

Dave

[glastolover]

Yes, have had the outlet hose off, drained it out, looked all the way down it and it looks totally clear. Sink drain that it connects into is draining absolutely fine.

I can’t be sure if the pump is spinning, but it sounds like it to me. The noise I mentioned is a strange whirring it makes when it is trying to drain and failing. Maybe I can record the noise and put it here so you can hear it…

Short of that, I think I am out of ideas on this, very frustrating!!

[electrofix]

the pump pumps into the chamber on the left of the machine and then goes up the outlet hose from there

if you take the left side off you can look into the chamber and see the water flow

have another look in the pump chamber,. as the water leaves the chamber there is a rubber flap thats meant to act as a non return valve. Push this open and see id anything is stuck in it

As for knowing if the pump is running if you take the pump cover off and quickly open the door while its pumping out you can tell by the water turbulance

Dave

[glastolover]

Hi again. I think I can see where you are saying the outlet water flow is having taken the left side off. See these pics:

https://drive.google.com/drive/folde…Az?usp=sharing

I think the chamber on the close up photo is the one you are talking about?

Unfortunately I can’t see how I can get into anything to check for a non return valve or any other blockage.

I tried popping the hose out of the little retainer below the chamber, but not sure if I can disconnect it here or not, seems pretty well stuck together…

It does look quite clogged up on the left hand side generally… is that normal?!!?

Any advice based on these pics would be very much appreciated, thanks a lot…

[electrofix]

to get into you have to remove the chamber but cant see any major blockages in the outlet

run the machine and watch when it pumps out

the non return valv is on top og the pump so you wont see that from here

Dave

[glastolover]

The pump is not working. It now just sounds like it is starting to run, but then it immediately stops. Does this 3 times, then nothing. No sign of any movement in the chamber. Not sure, but maybe some sign of movement in the water in the machine, but it only starts trying to run for maybe 1 second, so difficult to be sure.

I guess I am at the point where I will have to call someone out if there is no other advice. Quite frustrating as I do believe that given a proper service manual, I could take whatever needs taking apart out and sort it out myself. Thanks for your help anyway, do let me know if you have any other thoughts.

[glastolover]

OK… final attempt – what I described above was with the machine sitting with a fair amount of water in the bottom having failed to drain before.

I just bailed it out and ran a rinse cycle again with virtually no water sitting in it. In this condition, the pump does sound like it is running longer and properly, but there is no movement at all in the left hand side chamber. When I open the door, the small amount of water sitting in the sump froths up.

I am thinking this means that it could well be the non return valve being blocked that is causing this…?

If I could find some instructions on how to remove the pump to check that, I think I could do that… any chance anyone can help with that?

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