bosch dishwasher check water light

[suedehead1]

Bosch dishwasher SMS40T32UK/45. the check water light comes on almost immediately its switched on,
no water in the base. it does nothing no fill no empty no noise at all. its a free standing unit.
any ideas?

[electrofix]

look up bosch part no

646776

Dave

[suedehead1]

hi Dave, i have had a look at that part, never seen one before do you think thats the problem

[suedehead1]

is that part number correct? seems to be a dryer part

[electrofix]

me having a senior moment and posted on the wrong page sorry

will delete my post above

Dave

[suedehead1]

no problem

[Kentish]

Drain pump.
That would be my first point to look at.

[ali_g12]

Kentish wrote:Drain pump.
That would be my first point to look at.

+1.

Without any diagnostic facility it’s difficult to know where to start with the Bosch machine without a digital display. Perhaps a Bosch engineer could tell us what they’d do?

I’d have a look at the regen valve as I seem to remember similar symptoms if that goes – E19 I think.

[electrofix]

so the check water light comes on as soon as you turn on, does not even wait till you try and set a programme ? correct ?

is light on or flashing ?

Dave

[suedehead1]

the light is flashing

[electrofix]

ok so that means its not a water fault

if the light was not flashing that would be a water fill fault

the fact its flashing means it can be anything else which is not a lot of help as its not a specific fault code

Dave

[suedehead1]

Thanks i decided to tell customer to buy a new one,

[twicknix]

I have similar experience with this dishwasher and it is a mystery.

I find that isolating from the mains sometimes solves this or even replacing the drain pump and flow meter reed. I don’t know if the heat exchanger drain valve is the cause so it is a case of parts bingo. One of them will cure it.

[neon_3SP_glow]

electrofix wrote: ok so that means its not a water fault

if the light was not flashing that would be a water fill fault

the fact its flashing means it can be anything else which is not a lot of help as its not a specific fault code

Dave

Is this flashing/not flashing, water or not water related across all Bosch D/W’s – never knew and seems very helpful.

What annoys me most on the Bosch D/W is the random leaks which cause anti flood every few months, but NEVER appear when I test the units.

[electrofix]

its quite often the leaking polynex bases

Dave

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