Zanussi dishwasher constantly filling - ZDT24004FA

Changed the triac and......exactly the same. Assuming that the Triac is therefore being triggered by something else on the board; this is now beyond my electronics knowledge. Either buy a new board for £136 and hope it is that, call in a expert or (I find this option tempting though it goes against the grain) chuck it out.

 

Good thinking. I'll have a go later, the flood protection triggering is what started the whole thing, but that could have been just a symptom of the continuous fill rather than the other way round. I disconnected every connector to the board apart from the one connected to the valve (and the 240v supply obviously) and still the bloody thing activated. It did cross my mind logic corruption,

To be honest washing up as we go is not much more difficult than loading and unloading the dishwasher, I have a sneaky feeling it might be easier but daren't express that opinion! Not in a hurry so will continue to fiddle.

 

No go I am afraid.

I went so far as to completely remove the board from all connections to the dishwasher other than its 240v supply. Still 240v on the board output pins to the supply valve, in other words the valve is open and supplying water no matter what else fails on the dishwasher, which can't be the default position.

I have now exhausted my electronic skils so looks like either a new board at £136 or a fixed price repair at £146. Just have a niggling concern that it may not be the board but surely everything points to that.

 

Same with Zanussi. Just wondering what would happen if the engineer they sent out said it couldn't be repaired and didn't bother to check or replace the board. Since the fixed price repair is £145 and the board is £136 it makes one wonder how the engineer, who will be subbed, would make anything in the event it is the board. He would also be unlikely to carry the board, I would have thought, so a return visit would also be necessary to fit it. The temptation would be to say it is not repairable, or am I being cynical?

It's only 18 months old.

£75 credit if not repairable which is not particularly generous given the £145 I would have already paid for the callout.

Or I could just take a chance and order the board myself.

 

Yes, that's what I was thinking that many of the calls may be simple and perhaps not require any parts. Think I'll go for the fixed price repair.

 

I remember when every piece of electronic equipment came with it's own circuit diagram (that dates me!), those were the days. Expensive now to get service data.

 

I looked at the data sheet for this triac and yes, as you say, it can be driven directly by the logic. I think I have gone as far as I can given my skills so time for a board swap, whether on a fixed price repair from Zanussi, which is a guaranteed fix, or by myself.

With my luck I will swap out the board and find it still does the same thing; at least with the fixed price repair, which is only £10 more than the board, I get this fixed whatever it is, allegedly!

 

Yes, 3 months.