Re: samsung dw-bg 582b dishwasher
It’s incredibly difficult to prove, either way, aside from getting pretty expensive to do so that’s why you will struggle.
The general rule of thumb being that, if it didn’t fail within a few months then chances are the fault was not present when the machine was sold.
More so if there are not multiple instances of similar issues.
Unless is absolutely without any shred of doubt whatsoever that the fault was there from new then no company will say that it was or they could find themselves in trouble.
K.