How can I resuscitate a Bosch dishwasher?

[Roger Mills]

My Bosch built-in dishwasher seems to be pretty dead - no lights
showing, and no response to the on/off switch. It seemed fine when I ran
it yesterday, but probably didn't finish its cycle. SWMBO emptied it,
assuming it had finished and that I had turned it off - but I hadn't.

When I came to use it today, in addition to its not responding, there
was quite a lot of water left in the bottom - but not enough to cause a
flood when the door was opened.

I've checked the fuse and the socket into which it is plugged, and both
are fine.

Any ideas what to look for?

TIA.
--
Cheers,
Roger

[Bob Eager]

It's not clearing of water, so it naturally stopped.

First thing is to get all the water out. Check for a jammed floar or
similar in the bottom; that stops the machine if flooding, but it looks
as if it did its job.

Next thing is blocked filters. Clean them (I do mine monthly). If it then
runs, does the pump operate? The above might be enough for it to fill and
run, but not to empty. And of course a hose could be leaking into tyhe
bottom.


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[Animal]

Divide & conquer, to track down where the power changes from on to nothing.

[Fredxx]

No lights is worrying. There would normally be some indication power is
connected?

I would probably google your model and no lights to see if it's a common
fault.

[Tim+]

Bob Eager <news...@eager.cx> wrote:
> On Sun, 06 Nov 2022 22:39:47 +0000, Roger Mills wrote:
>
>> My Bosch built-in dishwasher seems to be pretty dead - no lights
>> showing, and no response to the on/off switch. It seemed fine when I ran
>> it yesterday, but probably didn't finish its cycle. SWMBO emptied it,
>> assuming it had finished and that I had turned it off - but I hadn't.
>>
>> When I came to use it today, in addition to its not responding, there
>> was quite a lot of water left in the bottom - but not enough to cause a
>> flood when the door was opened.
>>
>> I've checked the fuse and the socket into which it is plugged, and both
>> are fine.
>>
>> Any ideas what to look for?
>
> It's not clearing of water, so it naturally stopped.
>
> First thing is to get all the water out. Check for a jammed floar or
> similar in the bottom; that stops the machine if flooding, but it looks
> as if it did its job.
>
> Next thing is blocked filters. Clean them (I do mine monthly). If it then
> runs, does the pump operate? The above might be enough for it to fill and
> run, but not to empty. And of course a hose could be leaking into tyhe
> bottom.
>
>

Most dishwashers have a “flood tray” underneath with a float switch that
cuts power in the event of any leak. You may need to pull your machine out
to check this.

Tim

--
Please don't feed the trolls

[Roger Mills]

On 06/11/2022 23:35, Bob Eager wrote:
> On Sun, 06 Nov 2022 22:39:47 +0000, Roger Mills wrote:
>
>> My Bosch built-in dishwasher seems to be pretty dead - no lights
>> showing, and no response to the on/off switch. It seemed fine when I ran
>> it yesterday, but probably didn't finish its cycle. SWMBO emptied it,
>> assuming it had finished and that I had turned it off - but I hadn't.
>>
>> When I came to use it today, in addition to its not responding, there
>> was quite a lot of water left in the bottom - but not enough to cause a
>> flood when the door was opened.
>>
>> I've checked the fuse and the socket into which it is plugged, and both
>> are fine.
>>
>> Any ideas what to look for?
>
> It's not clearing of water, so it naturally stopped.

I suspect that it stopped for some other reason, and failed to clear as
a result.
>
> First thing is to get all the water out. Check for a jammed float or

> similar in the bottom; that stops the machine if flooding, but it looks
> as if it did its job.

I've sucked all the water out, but it made no difference.

>
> Next thing is blocked filters. Clean them (I do mine monthly). If it then
> runs, does the pump operate? The above might be enough for it to fill and

> run, but not to empty. And of course a hose could be leaking into the
> bottom.
>
>
I've cleaned the filters, but they were not blocked. By taking off one
of the covers below the filters, I have exposed the impeller of
(presumably) the drain pump. I can turn that by hand and can feel the
effect as it passes each pole of its motor.

I've removed the plinth so that I an see underneath, and it's dry as a
whistle - so there are no leaks to the outside world.

As others have said, I would expect *some* lights to be on - but zilch,
and no sign of life.

--
Cheers,
Roger

[charles]

In article
<928262793.689500715.663...@news.individual.net>, Tim+

Our washing machine has one of those, but it told us why it stopped working.

--
from KT24 in Surrey, England - sent from my RISC OS 4té
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

[Theo]

Roger Mills <mills37...@gmail.com> wrote:
> I've sucked all the water out, but it made no difference.

The float switch can be very sensitive, even a few ml of water can trigger
it.

Wait until it's completely dry.

> As others have said, I would expect *some* lights to be on - but zilch,
> and no sign of life.

Some of them just have the float switch in series with the mains inlet. Any
water in the machine and it's completely isolated.

Theo

[Brian Gaff]

Float switch?

I gave up on dishwashers. They do seem to have a very poor reputation.
Splits in the rotating arms where the water comes from, blocked up pumps
and sticking float switches and they go rusty and plastic bits go brittle.
Brian

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"Roger Mills" <mills37...@gmail.com> wrote in message
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[fred]

In my experience dish washers are more trouble free than clothes washing machines.

[Thomas Prufer]

On Sun, 6 Nov 2022 22:39:47 +0000, Roger Mills <mills37...@gmail.com> wrote:

>Any ideas what to look for?

Here's another Bosch dishwasher, same sysmptoms ("dead"):

<https://forum.teamhack.de/thread/61296-geschirrsp%C3%BClmaschine-bosch-silence-plus-smu59mo5eu-kein-strom/>

and ebay sells TNY264GN plus 100 Ohm 3 Watt resistors, as a fix...

I'd start by opening up the top, pulling the electronics, and looking for the
obviously deceased.


Thomas Prufer

[Brian]

The following is based on my experience of most common problems having
owned dishwashers since the 1980s:

First unplug it then get the water out.

Try lowering the waste pipe and putting the end over a container or, if
possible, out a door. Generally, that will drain some of the water.

If not, suspect a blockage. Either water, expect to use a cup etc to remove
the rest.

Generally, the water is detected by a air operated pressure switch- at
least in my experience. These have a thinnish pipe, often clear, which goes
from the sump area to a box with a few wires mounted well above the water
level.

Normally, the water forces the air in the pipe up the pipe, operating a
switch. The pipe sometimes gets blocked by gunge and the machine gets
‘confused’.



Clear the gunge and you may be in luck.

The fuse is worth checking easy but not something I’ve seen go.


I don’t recall seeing any internal fuses in machines but it is worth
looking.

Next, bad joints. Has water leaked and caused a problem on one of the many
connectors? Sometimes you can clean them and hopefully cure the leak.

If you can solder, check the PCB for dry joints. These are far from rare -
temperature cycling, vibration, all help them form. Add in lead free solder
if it is new enough and….


A crack in the PCB is also possible. If you can solder, these can be
repaired - use solder and wire, not just solder.

Obviously the pumps but I’ve never seen one fail. The ones which circulates
the water tend to be robust and the ones which pump it out aren’t over
worked, unless they get bunged up.

[Fredxx]

Are you saying after all that the lights, currently not working, will
magically illuminate?

If so, please explain why? So far, the only other plausible explanation
is a faulty float to mitigate floods.

[Rod Speed]

Brian Gaff <brian...@gmail.com> wrote

> I gave up on dishwashers.

I haven't with them, washing machines, cars, computers, houses,
pets and a great raft of other stuff as well. They are much too useful.

> They do seem to have a very poor reputation.

So does everything else I listed.

> Splits in the rotating arms where the water comes from, blocked up pumps
> and sticking float switches and they go rusty and plastic bits go
> brittle.

No point in giving up on dishwashers for that reason.

[SteveW]

On my previous and current one. Water in the tray doesn't cut the power,
instead it causes the drain pump to run continuously.

[SteveW]

On 07/11/2022 09:20, Theo wrote:
> Roger Mills <mills37...@gmail.com> wrote:
>> I've sucked all the water out, but it made no difference.
>
> The float switch can be very sensitive, even a few ml of water can trigger
> it.
>
> Wait until it's completely dry.

On a dishwasher that I used to own, that would not work. The switch was
held closed by a dry sponge. When the sponge got wet, it softended and
allowed the switch to open. However, the sponge had top be removed and
allowed to return to its normal shape before drying or it would just dry
in the tripped position.

[Peeler]

On Tue, 08 Nov 2022 03:55:46 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

<FLUSH the abnormal trolling senile cretin's latest trollshit unread>

--
MrTu...@down.the.farm about senile Rodent Speed:
"This is like having a conversation with someone with brain damage."
MID: <ps10v9$uo2$1...@gioia.aioe.org>

[The Natural Philosopher]

I paid £120 to have a Bosch dishwasher fixed. It lasted 3 weeks.
TNP's advice to people trying to fix Bosh dishwashers
Dont.
Throw the over advertised overhyped piece of german shit onto the
landfill where it belongs.
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