Beko dw451 cannot select program to use it

[sgking]

Hi all

In our current residence there is a beko dw451 slim disheasher which has worked really well for the last 6 months that we have been here. Then one morning i came downstairs to find it humming away but the dishes still dirty, so it did very little all night. I had a little play with the buttons to try to get it to work again and whilst the buttons worked, it wasnt performing as it should have, lights on the buttons were only working intermittently etc and all i managed was for it to fill and drain it wouodnt complete a full cycle. Then it wasnt able to do anything at all. It turns on and red salt light shows now and that is all. Ive removed it and taken covers off and inspected for any obvious signs of damage, but nothing jumping out at me. I checked all hoses for blockages and all are clear apart from one up the side that was blocked with gunk. I put it back together hoping this blockage was the reason for malfunction but nope it still wont let me select a program. It just turns on, tiny audible beep, all the lights flash briefly and red salt light stays on, thats it.
any help appreciated!

[andyjawa]

Cancel the existing programme. If it has a quick wash, reset the machine to that. Sequence on starting (if it will) is makes a pumping out noise – pump faults very common on any dishwasher usually jammed. Then fills with water, then wash motor turns on, soap dispenser opens, heater on……….
On a intial reset the pump should come on and if it does not there is a very subdued hum if so that is the problem which does not surprise me. However if it does pump out any existing water it then fills. If no fill it will hum or buzz as the solenoid fill valve is hunting for water that aint there = tap off, kinked hose or duff valve or duff water fill chamber blockage due to lime. If it does fill and fills to a normal level but the wash motor does not start up it can be the impellor flow meter that is duff (part 1760900100 so you can identify it) this part counts the flow of incoming water over time, when it is the right time = you have the right amount of wash water = the wash motor is switched on (in reality it happens a bit before that). If you hear a hum at that point the wash motor is most likley duff (and seized) OR if no hum the yellow wire (?from memory) in the door loom is broken where the loom goes at the bottom of the door into the underneath gumbins part of the dishwasher to the wash motor If you get this far and the wash motor is washing the soap dispenser should open after 5 mins approx and the the heater ( that is the metal tube thing as viewed from the r/h/s cover removed underneath ) comes on – very common failure point the heater tube part number18888150100 if the heater does not heat it will wash forever or until the machine senses it ain`t working = open circuit heater rarely is it the pcb end. They can be a bit of a bugger to work on like all dishwashers! But this is the general approach as to how to go about things. Best of luck. Any testing of the machine step by step functions as described you can do with the panels off but make sure you test it running alone as the machine will be on live, so: no lunatic kids running about and no dumb cats/dogs about – just friendly advice before it is too late! AND turn the machine off at the plug when …if… you discover the fault to inspect further.

Drain pump jammed or broken is common, Valve open circuit is uncommon, flow meter counter failure is uncommon, l/s/side water fill chamber blockage if in hard water are inceasingly common = stops the machine from filling, wash motor seized not unknown, broken wires behind the door panel fairly common, heater failure common (if in hard water area).

[sgking]

Hi and thanks very much for your reply. I fitted a new PCB (the smaller of the two) and that fixed it. My reason was a bit amateurish. All I knew was that power was ok, and all components worked ok, so it hopefully pointed to being some sort of computer issue and as the computer for the buttons wasn’t working when I was pressing the buttons s, thought I’d start there. The part was very cheap on ebay but I would have gone further with more parts oif needed. Just got lucky I suppose.

You are very knowledgeable so do you mind if I ask what was the blocked pipes function?its the clear pipe on the right hand side that disappears up into the right hand side of the machine? I’m wondering how the machine was operating whilst it was blocked with sludge!

thanks

[Author]

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