Bosch SE25M851GB/79 – Check Water Light

[richt222]

Hi All,

I’m trying to trouble shoot this, and almost at the point of giving up and just getting a new dishwasher. But as a last shot, I thought I would try posting here and see if I can collect some of your expertise!

The problem:

About a minute after starting the dishwasher, the check water light comes on. The pump still continues to fill the dishwasher with water. Then, after about 2 minutes of filling, the dishwasher starts to do intermittent draining. It will almost “pulse drain” with each drain pulse lasting about 4 seconds. Then it fills some more (about a minute or so), before pulse draining again.

When the dishwasher is filling, the sound of the water / pump moving is constant. However there is a definite cycle of bubbling sounds – bubbles for a couple of seconds, then a gap of 3 or so seconds, then bubbling again, then the gap, etc. I don’t know if this is normal or not.

(timings may not be quite accurate – all from memory!)

The digital timer never progresses, regardless of how long it is left running.

Attempts to rectify:

We had a dishwasher repair guy come and have a look, and after some poking around, said it was likely to be the main control unit board. We bought a new control unit and put it in place (£100 down). Unfortunately made no difference at all.

I spent some time looking at it myself today. Took the filters out, accessed the impeller (turns freely) and lifted the rubber non-return valve out. No problem that I could find there. Felt around for any chipped china etc. Nothing.

Took the side off and checked that there were no blockages in the drain pipes. I was able to blow through the drain pipe freely (when the non-return valve was removed). I ran the dishwasher with the side off, and could observe the water flowing in freely and seemingly being expelled freely.

I’m now a bit stumped as to what to check next. Would be great to get some pointers!

I could possibly post a video if it would help. But would be good to have some other things to check at the same time.

Thanks in advance!

Richard

[Simon46]

Re: Bosch SE25M851GB/79 – Check Water Light

Impellor jug required by the sounds of it.
Meters the exact amount of water going in.
Unplug power if youre going in.
Regards
Simon

[Martin]

Re: Bosch SE25M851GB/79 – Check Water Light

I agree you’ll need to buy and fit one of THESE

It’s a SIEMENS machine by the way and not a Bosch.

I hope you didn’t pay the guy for that Module Board but if you did you are entitled to a refund under the Trade Descriptions Act 1968. 🙁

[richt222]

Re: Bosch SE25M851GB/79 – Check Water Light

Thanks guys! I will get one of those ASAP, fit it, and report back.

Unfortunately, we bought the control module board ourselves. The guy offered to buy it, but for £60 more than we could buy it privately. Ah well, live and learn.

Thanks once again. I’m actually excited to try the impeller jug and see what happens! 🙂

[richt222]

Re: Bosch SE25M851GB/79 – Check Water Light

Just wanted to report back… This did fix it! Thanks once again.

[Simon46]

Re: Bosch SE25M851GB/79 – Check Water Light

Well done and happy dishwashing
Simon

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