Siemens Dishwasher not completing cycle

[Leppy]

Hi all, hopefully you can help. I,ve just fitted an old Siemens dishwasher that’s been in store for about 8 yrs. SE26T8S2 S9B1S.. It fills ok but seems to stick on a cycle of fill and empty in quick succession , lots of gurgling.The check water light comes on.Tried it on all the cycles and only once, short rinse, did it go into a wash cycle. All other times sticks on the fill/ empty. Water is cold in the base. It will empty and finish the cycle only if I press the cancel buttons. I’ve taken the side off and very clean inside and everything looks ok. Before I scrap it is there a simple fix please. Thanks.

[electrofix]

seems to be an old unit

left hand side there is a chamber with a float in it. there is a pipe comong off this into the sump

bet its blocked with goo

Dave

[Leppy]

Thanks, There is a red float that goes up and down about 10mm when it’s filling. It’s very clean and free moving. The whole thing looks like it’s hardly been used considering it’s age.What throws me is that it did pump water through the spinners once but then went back to the pump and empty. If the heating block has gone would that stop the cycle . It fills the sump inside ok but doesn’t pump (only the once) and drains ok when I cancel the cycle.

[electrofix]

Leppy wrote:Thanks, There is a red float that goes up and down about 10mm when it’s filling. .

then the pipe is blocked into the sump

float should not move unless it overfills

Dave

[Leppy]

Thanks Dave, It fills fine and quickly without the float moving. It’s only when it;s full that the float moves up and down and goes into a pulsing fill/ empty so I guess there’s a fault preventing the fill from switching off and proceeding to the next cycle which I guess is the circulation pump. Could it be a fault with the circuit board. It’s so clean inside that it seems a shame to scrap it.
Frank

[electrofix]

ok in that case its over filling

that must mean the check water light is coming on

look up part no 424099

this item counts the water in

it could be this item ( and a lot of the time it is )

the wiring to it ( rodents etc or broken wires going to the timer )

a cheap way of fixing this item as bosch want £18 for it is to remove it and take out the small circuit board on it. you will see a glass reed switch which you can get for a few quid. solder a new one in and replace

Dave

[Leppy]

Thanks mate, that looks exactly what it could be. I,ve taken it off. There are plenty on fleabay stating original part so will get one, and it’s listed as suitable for my machine. The wiring looks ok. Thanks again, I’ll let you know how I get on. Frank

[Leppy]

Hi Dave, after a lot of faff with the first jug I ordered not being sent, the 2nd turned out to be just the board and reed switch, I fitted it to my existing jug and it works a treat. Happy that I’ve saved a good machine from the scrapheap and didn’t have to replace it with cheap crap from china. Thanks again, brilliant advice. Frank

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