Bosch SGS4302 – not heating up and stuck on 1 minute

[Penguin45]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

The cavity (stainless steel box) has to come off. To do this, there is a screw in each corner, sump moulding screws, salt cap collar, door and fill matrix to be removed. Patience job, but possible.

Penguin45.

[ProgRob]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Just to let you know that I have fitted the part and all appears to be back to normal 😀

For anyone thinking of replacing the heater on a Bosch like this, it took me about 2.5 hrs and this is the first time I have done it.

Many thanks to everyone for the advice.

Cheers,
Rob

[iwooll]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Just wanted to say thanks to Penguin45 and ProgRob. I had the same probel as listed above and followed the instructions given by Penguin45 and also replaced the water heater on my Bosch. I was certainly encouraged to do this by ProgRobs feedback on how he got on fitting the new part so thanks to both. :beer:

[Hucky]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Again, thanks to Penguin45 and ProgRob, mine turned out to be a dry solder joint on the pcb, but only after testing everything else (typically). All works like new again, saved me a small fortune, thanks. If anybody wants info for the pcb repair, my symptoms were 1 minute remaining, cold water (i.e. not heating during cycle), but would pump out if reset (1st and 3rd buttons from LEFT). I am happy to provide full walkthrough if you pm me. – basically POWER OFF ! – remove all screws around door from inside (T20) – remove display cover (2 screws and 2 flexible tabs, lift up and off) – remove screw from right hand side of door (edge) – note, or photo cabels and remove – pop out pcb module – look for dry joint (it will stand out like a sore thumb) resolder and reverse dismantle procedure. Turn on and test, water should get warm ! 😀

[davidros]

Hi

This is a very helpful thread as it exactly describes my problem – water not heating, 1 minute error – so I guess my heater element/control board is broken. Yet to take the machine apart to see which it is. Mine is a SGS5342GB/17 – about 9 years old.

I can see the spare heater element in the store area but cant see the controller board for my model. Any idea where I can get it from if that is what i find I need?

Thanks David

[nomadPaul]

davidros wrote:Hi

This is a very helpful thread as it exactly describes my problem – water not heating, 1 minute error – so I guess my heater element/control board is broken. Yet to take the machine apart to see which it is. Mine is a SGS5342GB/17 – about 9 years old.

I can see the spare heater element in the store area but cant see the controller board for my model. Any idea where I can get it from if that is what i find I need?

Thanks David

David , before you go ahead , have you checked the water levels 1st ? The most common cause of a Bosch dishwasher not heating and sticking on 1 minute is low water levels caused by a blocked pressure chamber/ hose. You will need to check the left hand side/front left lower area to find these particular parts.

When it initially fills , does it make any thunking noises ? The water should just about cover the whole of the base inside the machine once its been running for a few minutes. If it doesn’t then i’d definitely check the pressure chamber/hose 1st as it may save you a lot of time , effort and money.

[davidros]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Hi

Thanks – I will check that. Once I get to the pipes do I need to remove them to check they are not blocked or is there an easier way of checking this ?

Thanks

[nomadPaul]

Check out this thread .

It has some nice photo’s to show you what you’d be looking for .

http://www.ukwhitegoods.co.uk/modules.p … ic&t=40632

[davidros]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Hi

Thanks.

Is the controller board the one behind the button on the top right hand side of the door – if so this looks OK from a visual perspective.

So am now trying to get into the side panel. I have removed the two screws that are at the front for each panel but silly thing is I cant see how to remove the panel itself and I cant locate any obvious other screws that might help. In earlier post it says to “Remove plug, lid, door outer, side panels and lower cover plate” – I am not sure I need to remove the door outer to get at the side but maybe the top has to come off ? It looks like the top hinges at the back but other than that it is very firmly secured onto the machine.

Can someone point me in the right direction to get the sides off ?

Thanks

[davidros]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Hi

Have made progress since last post. Have sides and top off now.

So here is where i have got. The heater on open circuit seems to have 25ohms across it so I presume I can assume that is OK – i have measured it across the white device to the back on the right hand side. There are two main terminals situated horizontal to each other so I assume i have the right part.

I have cleaned out the chamber on the left hand side – i can see the blue amr moving in and out. I wasnt sure how this worked until after i cleaned it. There was some scale buildup but not terrible.

I havent removed the hose yet as still trying to work out how to get the front bottom of the machine off as that is where the hose seems to go. That said I can see water moving freely through the hose and the inside of the machine seems to have normal amount of water in it.

So in conclusion now starting to get to the parts but no obvious cause of the fault. I may have a closer look at the control board next.

What do people suggest ? And if I need a new board where can i get one from as my model doesnt seem to be listed.

Thanks David

[nomadPaul]

To get the lower front panel off needs the door outer panel off ( 6 screws along inner edges ) This will allow access to lower plate ( 2 screws – 1 either side ) and this should then reveal the metal lower front plate – 2 screws. this will reveal the lower hose.

[davidros]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Hi

Thanks – it seems that this pipe being blocked is not the source of the problem.

I have also checked the voltage across the heater during a run and cant see anything so no power being fed to the heater.

I have also noticed something different as I have gone about my investigations. When I stop, and then restart a programme it doesnt always resume at the same time. eg it gets to 30 minutes and when I stop and restart it goes back to 72 minutes. Some times when I start a programme it comes up with a delay time eg 2h even though I havent pressed the delay button.

So my suspicion is that the control board is progressively failing.

What are people’s thoughts on this ? And any idea where I can get a replacement from as the spare parts on this website doesnt seem to list the part for this machine.

Many thanks, David

[iwooll]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Have a look at ransomspares.co.uk that’s where I got my heater from. failing that try the Bosch uk spares site, it takes some navigating but if you persevere you should turn up what you are looking for.

[davidros]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Hi

Thanks. The only item I can see on the ransomspares site is a “module” at £135 – wow that is a bit pricey. Especially as being no expert I can be 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure this is the right part.

Anyone out there willing to look at my circuit board and possible fix it (for a fee of cours) – or is that not a smart thing to do ?

Thanks

[davidros]

Re: Bosch SGS4302 – not heating up and stuck on 1 minute

Hi

There is a guy on ebay doing repairs for about £50 – and seems to be 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} rated.

Given earlier symptoms etc is the consensus that it is now likely to be the module that needs sorting ? Anything I can do to firm this diagnosis up ?

Thanks David

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