How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Techdesk Your Own Question
Techdesk
Techdesk, Service Engineer
Category: Appliance
Satisfied Customers: 16409
Experience:  Whitegoods engineer working for a multibranded national company in the UK
13782322
Type Your Appliance Question Here...
Techdesk is online now

I have a Bosch SGV53E03GB/56b integrated dishwasher. The machine

Resolved Question:

I have a Bosch SGV53E03GB/56b integrated dishwasher. The machine seems stuck in a continuous loop of accepting water from the mains, then pumping it straight out without the tub ever filling up. I've read about some 'anti-flood' mechanism being activated if water gets inside the machine (probably from a leaky seal?) Any help would be gratefully received!!! Nik
Submitted: 3 years ago.
Category: Appliance
Expert:  Techdesk replied 3 years ago.
Hiya,
What you describe would suggest a problem with the pressure chamber and transfer hose.

Unplug the appliance.
Take it out.
Take the left side panel off.

The smaller of the 2 chambers is the one to check first.
Is it blocking?

Thanks
Customer: replied 3 years ago.

This sounds really daft...how do I take the left side panel off?


 


Screws? Slide off?


 


Cheers!

Expert:  Techdesk replied 3 years ago.
Hiya,
Open the door, look at the front edge.
There are screws there.
Take them out.
Pop the panel off at the front, lift it up a little, pop it off at the rear.
Pull it out as if to lay it down and lift up.

Thanks
Customer: replied 3 years ago.

Side panel now off!

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, now if you plug in and run the machine you can see what's happening with the smaller chamber.

Is the pressure chamber blocking up?
Is it scaled up?

Thanks
Customer: replied 3 years ago.

What does a pressure chamber looked like when it's blocking up?


 

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, take a photograph of the chambers on the left side and post them here, or, upload them to a file sharing site and post the link here.

I'll be able to tell if it's blocking.

Have you run the machine yet and watched the pressure chamber working?
If not, please do so and let me know what happens.

Thanks
Customer: replied 3 years ago.

Which one in the picture is the "pressure chamber" please?


 


https://www.dropbox.com/s/doj4h2pt0bzku3i/2014-07-06%2013.47.24-2.jpg


 

Expert:  Techdesk replied 3 years ago.
Hiya,
As I said earlier, the smaller one is the pressure chamber.

You can clearly see that the chamber is blocked and there's some blocking in the large chamber.

Keep the machine unplugged.
Put towels down.

Take the large tank off, don't disconnect the hoses, simply release it, lift it up and lay it down.
A lot of water will come out of it, get as much as possible outside the machine, onto the towels.

Then, disconnect the wiring to the pressure chamber.
Take the panel below the door off.
Take the pressure chamber out.
Take the transfer hose from the chamber to the circulation pump off.

Clean out the hose and replace.
Take the chamber apart, it's clip together plastic.
Clean it all out.
Reassemble it.
Refit it.
Refit the larger tank, ensuring the O rings are sealing properly.

Try the machine again.
(If you spilled water inside, mop it out with a towel first).

If all is well, it should now be working.

Let me know how it goes.
Thanks
Customer: replied 3 years ago.

  1. Took chamber apart and cleaned.

  2. Removed transfer hose and cleaned.

  3. Refitted chamber and transfer hose (no shops open atm).

  4. Refitted larger tank.

  5. Refitted front panel.


 


Turned the water and electricity back on and closed the door...


 


...still the same problem!


 


The larger tank looks really blocked in the top-left hand corner; would this be affecting things at all?

Expert:  Techdesk replied 3 years ago.
Hiya,
Yes, the blockage in the larger tank can cause problems.

When you try the machine, it runs the drain pump and fills, the flushing phase.
The drain pump stops and it begins filling.

Does your machine do this?

If yes, does the orange float then come up and trigger the pump switch?

Thanks
Customer: replied 3 years ago.

When I switched the machine back on, water circulated around the large tank, through the pressure chamber, but the orange (plastic tube looking) float hasn't moved.

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, is the red rod at the bottom raise, pressing on a switch?
If it is, you have water in the base that needs to be removed.

Thanks
Customer: replied 3 years ago.

No, red rod is in the "down" position i.e. switch has NOT been triggered.


 


Should I take a photo of the gunk in the larger tank for your inspection?

Expert:  Techdesk replied 3 years ago.
Hiya,
No, it's ok, what you originally described was a machine filling and emptying.

What you now describe is a machine emptying all the time.

The large tank has 4 tubes.
The 2 rear tubes are the drain, which tubes have water going through?

Thanks
Customer: replied 3 years ago.

The tubes are faintly labelled 1 to 4, with 1 being closest to the rear of the machine.


Tubes 1,2 + 4 seems to have water going through them.


 


Tube 3 - which has a blue hose with a clamp on it - it's hard to tell if any water is going through.

Expert:  Techdesk replied 3 years ago.
Hiya,
Tube 3 is the water inlet.
If there's no water coming in there and you have the drain pump running all the time, then your fault isn't as you initially described.

Lift the red rod and drop it a few times so you activate the switch.
Then try the machine again.

Is it still the same?

Thanks
Customer: replied 3 years ago.

Lifted the red rod and dropped it a few times...this seem to partially drain the water from tubes 4+5.


 


Still the same though...

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, I'm afraid what you describe is a main control board fault.

The drain pump just runs all the time.
It's not taking in water (tube 3 shows no water coming in).

Sorry
Customer: replied 3 years ago.

If tube 3 shows no water coming in, then where is the water coming from that is circulating around the other tubes?


 


Also, how do I access the main control board?


How much is a new one please?

Expert:  Techdesk replied 3 years ago.

Hiya,
It's residual water.
It's not circulating, it's simply being moved.

Pour water into the machine manually.
Then start it, you'll see it getting pumped out then it will be back to what you see now.

If it starts washing, let me know.

 

Control board is in the facia and costs around £100


Thanks

Customer: replied 3 years ago.

I tried the machine with the mains water turned off...almost all the water in the tubes drained away.


 


Then I switched the water back on and a torrent came circulating around the tubes...does that still mean that no water is getting in?

Expert:  Techdesk replied 3 years ago.
Hiya,
No, if it's coming in on tube 3, then water is coming in.
However you stated earlier it wasn't.

If water is getting in then you should also see it in the pressure chamber.

Double check the wiring to the pressure chamber switches.
Do you have them on correctly?

Thanks
Customer: replied 3 years ago.

Yes, water is in the pressure chamber.


 


Checked the wiring; as in original photo.

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, so if the drain pump simply runs all the time and never stops, and, the switch isn't being activated, it only leaves the main board.

What happens if you lift the red rod?
Did you manually fill the machine with water?
If yes, what happened?
If no, do so now.

Thanks
Customer: replied 3 years ago.

  1. Lifting the red rod stops the water circulating around the tubes and drains tubes 4+5.

  2. How much water should I fill it with? Above the filter?


 

Expert:  Techdesk replied 3 years ago.
Hiya,
Yes, above the filter so it's full.

I think your circulation pump is stuck on, not the drain pump.

On the side of the pressure chamber is a blue lever, is this flat against the circular part?

Thanks
Customer: replied 3 years ago.

Yes - lever is flat against the circular part.


 

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, and is it washing now you've filled it with water?

Thanks
Customer: replied 3 years ago.

I manually filled the tub with 5 cms of water (the maximum before it started to spill out the sides), closed the door and it's all drained away.


 


Everytime I switch the power on/off, the water always seems to drain away.

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, as I explained earlier, if you start a new program, it runs the drain pump first.

You need to start again.
Start a new program.
(I'm assuming you can cancel and start a new program, if not, tell me).

When it's filling and not draining, open the door.
Fill to just above the filters
Shut the door.
Does it drain or wash?

Thanks
Customer: replied 3 years ago.

I can't cancel this dreaded program/sequences.


 


None of the buttons respond, and all the LEDs are out!!!

Expert:  Techdesk replied 3 years ago.
Hiya,
OK, now that information would have changed the diagnosis right at the beginning.

Your main board has failed.
We know power is getting in.
You have no lights on the controls, the board has failed.

Thanks
Customer: replied 3 years ago.

Sorry to have wasted your time.


 


Any advice about the main board please?

Expert:  Techdesk replied 3 years ago.
Hiya,
No, you haven't wasted my time, I've wasted yours.
However, you've probably learned a bit on how the system works in your dishwasher.
The chamber also needed cleaning out too.

There's not much to advise on.
You need the décor door off.
The facia panel out and then the board out of the facia.

It's a straight forward swap out.

Given the cost of the part I'd suggest it may be worth paying a little extra and getting a fixed price repair that includes parts and labour.

British Gas, Knowhow (Currys) and Repaircare all do this.

I know British Gas charge £125 and no charge if it can't be repaired.
The others you need to get a quote from.

Good luck with it.
Hope this helped
Thanks
Techdesk and other Appliance Specialists are ready to help you