Just to wrap this thread up for any future readers. The culprit was a thermostatic shower mixer that was passing from the cold to the hot side. I dismantled it, descaler it and fitted new o-rings ( as best I recall) and that fixed the problem.
My dishwasher has started leaving a salty film over the crockery and glasses after washing.
I have:
Checked the salt container is tightly closed
Reduced the hardwater setting to minimum
Used only basic tablets, containing no salt
Checked the sump and drain for blockages and cleaned the filters...
Thanks Tony. Interesting to have someone else think it might explain the symptoms. I had wondered about flow across a mixer, but never having had one apart It didn't feel to me like there would be enough flow from cold to hot side to notice. Could there be?
And how might I identify which...
Hoping for help on a problem that has me stumped.
In the last week or so, we have started experiencing a new problem where our hot water runs cold. I think I've ruled out all the obvious things, and we are not talking about the usual combi boiler problems - we don't have a combi and have a...