AEG Dishwasher Low Pressure Fault

[VickieS]

Hi

I have an AEG dishwasher (fss62807p) which fails with a i11, low water pressure fault, at the same point, halfway through (2 hours into a 4 hour wash) the ECO wash programme.

It does this at no other time and on no other wash programme as far as I can tell.

Does anyone know what is peculiar to the ECO cycle which may be causing this? I think the failure occurs when this programme attempts to load water for its first rinse.

Thanks all

[electrofix]

I11 listed as
could be valve slow filling or the pressure sensor not registering properly because of fault or blockage
Dave

[VickieS]

That is very useful thank you.

Do you have any theory as to why this only happens at a certain point in the middle of only one programme – the ECO cycle? Is there any maintenance function that allows one to time/test the flow rate, do you know?

Cheers

[electrofix]

i would check for blockages in the pressure circuit first

nothing different about the fill later in the programme

Dave

[VickieS]

I’m out of theories and I imagine the service engineers will be too now, when I report back.

Obviously I cleared all the filters as suggested, and I also removed the appliance pipe and checked the in-line filter and all was good. As the appliance was connected to the house mains supply by another 2 metre hose. I removed the inline filter from this, in case it was causing an unnecessary flow reduction. Problem did not resolve.

I reported the fault to AEG and they dispatched an engineer. He said that “there is no difference between the fill that that is reporting the error to any other fill in the programme” and suggested that the fault lay in the extension pipe restricting the water flow and that it needed to be shorter. I said “if there is no difference in this fill to any other then why is it consistently the only time that the machine throws an error?”. He just went back to saying it is a problem with the extension pipe.

So I spent the next weekend fettling and modifying my kitchen until I could connect the appliance pipe directly to the house plumbing. No change; i11 still thrown halfway through the Eco cycle.

The next engineer turns up and apologises for the pipe suggestion, saying it is obviously a control unit problem. Now I’m liking this, as I have though from the off that this is some sort of firmware bug.

Cutting to the chase, the dishwasher has now had both front and rear control units replaced and, you guessed it, it still behaves exactly the same.

Anyone here seen anything like this, or have any suggestions as to what may be the cause? Obviously an engineer will be returning once again, but it would be good to give him/her a steer if someone here has the solution, or a very likely reason for this most strange of faults.

Cheers.

[electrofix]

has any engineer changed or checked the pressure switch ?

Dave

[VickieS]

electrofix wrote:has any engineer changed or checked the pressure switch ?

Dave

Nope, not been mentioned, but wouldn’t a problem with that be triggering issues on all other programmes and not just at 2 hours and 1 minute remaining on the Eco cycle?

[electrofix]

VickieS wrote:

Nope, not been mentioned, but wouldn’t a problem with that be triggering issues on all other programmes and not just at 2 hours and 1 minute remaining on the Eco cycle?

you would think so but with what you have had swopped there is not much left

plus first fill is cold but by the time you fill 2nd time its still hot

admit its a long shot but its a cheap part to try

Dave

[VickieS]

electrofix wrote:

you would think so but with what you have had swopped there is not much left

plus first fill is cold but by the time you fill 2nd time its still hot

admit its a long shot but its a cheap part to try

Dave

I see your point and you are right, it is going to be something a little left-field that is causing the issue.

Just starting an experiment where I have let the programme run to within a couple of minutes of where the fault gets reported and have opend the door. I plan to leave it a couple of hours to cool, then shut the door and see what happens.

Accademic, I know, but easy to do, so I thought I would give it a try.

[VickieS]

The engineer attended today and changed the pressure switch. Just ran an Eco cycle and it threw the i11 error at 2 hours in, just as it always does!

I would like to get an opinion from the technical/design team at AEG, but have no way of getting hold of them. I have requested a contact from their service department, but they just pass my question on to me local (generic?) service centre.

Don’t know how to progress this now and the today’s engineer says he’s out of ideas. Inlet solenoid maybe?

[electrofix]

all i can suggest is you contact AEG customer services

Dave

[VickieS]

Ok, after all this faffing, the fourth engineer to visit spent very little time isolating the issue, although he admitted he had the benefit of knowing all that had gone before.

The simple problem was that the drain hose had fallen down the stand pipe so that its end was submerged in the standing water in the trap. The instant he pulled up on the drain pipe the machine could be heard to take a gasp of air. At that point he said that he was 99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure that that was the cause and as it turns out he was absolutely right.

I cannot see how to change the title of this post to include [Solved], so if a moderator would kindly do that please I would be grateful.

Cheers all.

[bbol]

Hi VickieS

I am having this exact issue! Is the fix something you think I could attempt on my own or would I need an engineer. I had cleared the filter previously- but the drain hose seemed to just clip into place so not sure which part you’re referring to- or if that’s internal?

Having read this I feel like there may be light at the end of the tunnel after some very unhelpful responses from AEG!

Thanks!!

[electrofix]

in Vickie’s case the oullet of the dishwasher goes to a stand pipe and is not connected direct to the sink waste. since this pipe has a water trap ( u bend) that holds water to stop smells from entering a building it can form air locks in the outlet hose if this hose is pushed so far into the pipe that it contacts the water. the outlet hose should be no more than 8 to 10 inches into the pipe

Dave

[bbol]

thanks for the info.

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