Just had somebody ring with a Bosch Dishwasher
They think the salt needs refilling very quickly,
I said i think it’ should last for about 7 to 10 washes,
But I am not sure, Anyone got a better idea
depends on how/ if they have set the water softener up. In general most are left on default setting however hard the water is as we all know nobody bother reading instructions any more. If its set for hardest water setting then your estimate is about right.
In general a full sized model with a full salt reservior set on the hardest setting you should expect the salt light to come back on after 20 or so washes. A 45cm model would show an average of 15 or 17 washes.