What do you mean by “water exiting on initial fill”? Every fill is the same other than what valve is opened and that’s open/closed, it’s binary with only the two options.
BTW, vinegar etc is all old wives tale, complete hogwash that’s gained traction as an “accepted wisdom” on the internet but, rubbish all the same. Does little at all in the real world.
By initial fill, I mean when the soap powder is taken down into the drum. It is as though the fill channel/tube is obstructed/constricted by a build up of sediment of some sort.
I’ve tried the ‘curtain wire down the pipe’ trick but that is not bringing up anything apparent.
We have had the machine for about 10 – 15 years and has not been a problem until about 6 months ago. Nothing in the fitment or usage has changed.