Neff dishwasher - failure to fill up

[roromac]

It's integrated and over ten years old. It's been chewed by rats and I've had to bridge wiring and pipework in the supply bundle that goes up to the "aqaustop". Now it'll work but only if I add a bucketful of water. The supply seems to work but the strange nylon network on the machine side fills only once before the float switch cuts off the supply of water. This is not enough for a wash. Anyone know where the fault lies?

 

[rocks1]

clean the chamber on the side also clean sump pipe undernearth its blocked with crud.

 

[roromac]

TKU. As far as I can see, the side chambers are free-flowing and need no cleaning. The pump empties the water easily. What do you mean by the sump pipe and why would that prevent the correct amount of fill?

 

[Leccy758]

Pressure chamber and switch measures how much water is in machine if its blocked (quite common) the machine cant sense water so stops.
you manually fill, it bypasses blockage the machine thinks its ok so carries on

 

[roromac]

OK, I follow. Facing the maching, the fill tubes are on the left side, not pressurised and with a syphon fill arrangement that should fill and empty at least three times as far as I can see. On the right hands side, the tubeways are dry/ Where do you mean by the pressure chamber?

 

[Leccy758]

Easiest way is to remove the fill tank carefully and clean the pipes from it into the sump (food waste often tracks backwards and bacteria grows in these pipes.

Usually on the other side of the machine is a thin pipe leading to a switch (normally a round or oval ish flat object) that pipe connects to the pressure chamber and the end of it can get blocked

 

[roromac]

TKU Rocks1 and Leccy758. I will try that.
Rob

 

[roromac]

Well I've blown thru the sump pip and any pipe I can find. The only thing I can think of is that the stepper motor timer thingy isn't allowing three fills before it moves on. Is this a fault anyone's heard of?

 

[assuhors]

Can you post a picture of the plastic chamber on the left hand side,so i can see which method of fill you have.

 

[roromac]

Assuhors
I've solved the problem: The rats had chewed the fill pipe and I had repaired it. They had made some plastic swarf which went through the system until the spray point at the top of the plastic pipe warren. This reduced the flow so that the fill water dropped into the syphon chambers. These filled and emptied and tripped the micro-switch, then the programme moved on. What should have happened and happens now is that the water sprays across the gap and fills the softener chamber by direct flow; that way the float doesn't trip until the fill level is correct. The entire problem was a few bits of blue plastic crumbs stuck in a narrowing plastic channel.
Thanks for your help up to this point.
Rob