Bosch Logixx SGS0902GB/04 – Soapy residue remaining

[clivew]

Hello,

I have the above dishwasher which has been working perfectly for the last 6-odd years. A couple of months ago it began failing to fill properly – I had the Bosch technician out who replaced the relay board. It now works fine, apart from one detail – and I would appreciate your advice as to whether this is expected behaviour or if it is indicative of a related/unrelated problem.

This is the problem: since the repair I have become aware on unloading the appliance that there seems to be some kind of soapy residue remaining on the plates and utensils. They’re all dried fine, but if you wet you hand then wipe it across a plate and rub your fingers together, there’s this nasty slippery feel as if the detergent is not being rinsed properly – or perhaps more likely, there is too much rinse aid being used.

So the question is: should you be able to detect the amount of rinse aid left on the dishwasher contents after the wash and dry is complete? I’m thinking, if there is enough for me to feel it come off on my hands when I’m emptying the machine, then I don’t really fancy it going in my tea next time I make a cup!

Is there some way I can disable the addition of rinse aid to test my theory? The appliance seemingly has two methods of rinse aid control:

1. The dial/knob in the rinse aid filler, which goes from 1 – 6.
2. On the LCD, a menu item where “Rinse Aid” can be set from 0 – 6 (note the 0).

Which does what? Are they both meant to be in sync with each other? What happens if I set the menu to ‘0’ with rinse aid still in the reservoir?

I very much look forward to solving this problem, because rinsing everything that comes out of the machine to get rid of this horrid stuff seems to miss the point of having the damn thing in the first place!

Many thank in anticipation,

Clive Wilson

[gegsy]

Re: Bosch Logixx SGS0902GB/04 – Soapy residue remaining

Hi
It seems strange that you are experiencing a different fault after the “relay” board, which Im assuming is the power module board in the base 😕 ; had been changed.

There is a slight chance that when it was replaced, the coding may not have been successful or correct.
I would therefore allow the engineer to return to assess to be fair.

Now to the rinse aid confusion 🙂 depending on what type of dispenser you have.
If you have a top dispenser, the rinse aid level will adjusted by yourself on the user menu. 0-7 where 0 is no rinse aid dispense. The other method is in the rinse aid compartment,by turning the arrow and again 0 will be no rinse aid dispense.
On that note also, you may come unstuck if you use 3 or 4in1 tablets in conjunction with rinse aid as you will technically be double dosing.

Hope that helps

Greg

[Martin]

Re: Bosch Logixx SGS0902GB/04 – Soapy residue remaining

If you are indeed using the 3 in 1 or 4 in 1 tablets it would be better to not use the liquid rinse aid and set the ‘electronic’ adjustment to ‘0’. The mechanical regulator within the dispenser will not allow you to switch the rinse aid off as it only goes down to a minimum setting ‘1’.

I wonder if a similar situation applies with the ‘electronic’ salt dispensing since the ‘relay board’ was changed? The new boards default setting is ‘0’ (I believe?) so that may need configuring to the correct setting based on your water hardness level for optimum wash performance. 😉

[clivew]

Re: Bosch Logixx SGS0902GB/04 – Soapy residue remaining

Martin wrote:If you are indeed using the 3 in 1 or 4 in 1 tablets it would be better to not use the liquid rinse aid and set the ‘electronic’ adjustment to ‘0’. The mechanical regulator within the dispenser will not allow you to switch the rinse aid off as it only goes down to a minimum setting ‘1’.

I wonder if a similar situation applies with the ‘electronic’ salt dispensing since the ‘relay board’ was changed? The new boards default setting is ‘0’ (I believe?) so that may need configuring to the correct setting based on your water hardness level for optimum wash performance. 😉

Hello,

Here’s an update on the fault I’m experiencing. I tried disabling rinse aid dispensing as suggested, by setting the ‘electronic’ ‘Rinse Aid’ adjustment (i.e. on the LCD, not the mechanical dial) to ‘0’. However, when it’s set like this, the soap drawer fails to open. I’ve tried several times just to check it wasn’t a flukey coincidence, and the same thing happens each time!

Any ideas what’s going on now? Is there some way in which the new power module that was installed in the right hand base of the appliance could be affecting the behaviour of the soap/rinse aid features? Gegsy mentioned something about the “coding may not have been successful or correct” – I’m not sure what he had in mind by this. Does the new board need ‘pairing’ with the control board in the door somehow? I seem to recall that after the engineer left I had to set up the LCD menus correctly again, as the ‘Hardness’ setting was all over the place – and I know he hadn’t changed it as I watched _everything_ he did!

Hope someone has some more insight on what could be going on here.

Kind regards,

Clive Wilson

[gegsy]

Re: Bosch Logixx SGS0902GB/04 – Soapy residue remaining

Hi
The coding information should have been administered by the engineer after module installation.
As I previously stated

I would therefore allow the engineer to return to assess to be fair.

as the job is obviously not correct and a return visit is necessary.

Regards

Greg

[Author]

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