Bosch SGS43A loss of spray pressure

[gardnecd]

First post – apologies if this is answered in the back-posts. I’ve searched and not really found what I’m after.

I have tried all the usual and obvious – cleaned filters, taken spray arms off and flushed and poked everythng. But the machine really isn’t cleaning well and on investivation the sprays just lack “ooomph”.

Had the sides off and the motor spins freely and doesn’t make any nasty noise so I am thinking there must be a blockage restricting the flow. I think this has been a gradual deterioration in performance rather than a breakdown.

What I’m figuring is that the “instananeous water heater” is a place to home-in on as somewhere that scale will form and attract (and cook) all sorts of grolly in the water, gradually reducing the flow to the sprays. I know there shouldn’t really be any scale (that’s what the water softener is for) but I live in a very hard water area and I bet the softener won’t be 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} effective. The machine has been in service for about 4 years.

A few questions:
1)
Does it have some sort of solenoid that diverts the flow to upper and lower spray bars? Sometimes when I open the door the bottom one is going (slowly), sometimes (but more rarely) the top one.
2)
Is this (the water heater) likely to be a cause of poor flow? £70-odd is quite a lot to lay out if I’m not sure. If so how the hell do you get at it? It’s buried in the tray, below the main casing. As far as I can see you’ve got to strip the whole thing down to its bones – and I don’t fancy my chances of getting it all back together without a leak! Is there a trick? Can you get at it from inside by removing the sump?
3)
Assuming sclale might be at least part of the problem what are the chances that a few massive doses of citric acid will shift the blockage and save a load of money and time?

Thanks in advance

Colin

[gegsy]

Re: Bosch SGS43A loss of spray pressure

Hi
More than likely the water diverter which is part of the heater has failed and if you are unlucky it may have taken the electronics out aswell.
Only fault finding will ascertain. Power off before investigating :plug:

To be able to giuve you part numbers and prices we would need the full model number usually eteched on the top inner stainless of the door.

Greg

[nomadPaul]

Re: Bosch SGS43A loss of spray pressure

it might be worth checking the amount of water in the appliance – when fully up and running , there shuld be a suffecient amount of water in the tub to cover the base . a lack of water could also give poor pressure

[Penguin45]

Re: Bosch SGS43A loss of spray pressure

Blockage in the hose from the fill matrix to the sump. Many, many posts on the subject. Net result, underfilling. Remove plug, outer door panel, kick panel and inner lower cover plate. Offending hose is in left hand corner. Remove, clean, replace.

Regards,
Penguin45.

[gardnecd]

Re: Bosch SGS43A loss of spray pressure

Penguin45 wrote:Blockage in the hose from the fill matrix to the sump. Many, many posts on the subject. Net result, underfilling. Remove plug, outer door panel, kick panel and inner lower cover plate. Offending hose is in left hand corner. Remove, clean, replace.

Regards,
Penguin45.

I will give that a go this evening – can do no harm – but the fill level seems to be fine. Water is covering the base of the machine – so lots of water in the sump. That was one of my intial lines of investigation so I removed and cleaned up the “pressure chamber” which appears to be what regulates the water level.

BTW if it turns out to be the heater/flow divertor thing as mentioned in one of the other replies (which appears to be all one unit) how much £ we talking?
product ID: SGS43A52GB/35

And how easy/hard to replace – looks hard!

RGDS

Colin

[gegsy]

Re: Bosch SGS43A loss of spray pressure

Hi
If required

Heater p/no 483257 £61.70 VAT etc
Module p/no 490049 £68.10 +VAT etc

These can be obtained from spares@ukwhitegoods.co.uk

Greg

[Author]

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