Water Pressure Issue? First water heater leaked, then softener, now my washer long filled
You did not say, if the washer fill problem was fixed with the new valves. Sometimes, when you turn off the water to the house to make a repair, sediment or debris is loosened somewhere in the plumbing when the water is turned back on. Did you check the inlet screens at the hose connections of the washing machine. This debris will plug the screens  (a common problem). Also make sure that all the valves for the water to the washer are fully open. As far as two appliances leaking it is probably a coincidence. The research with " the softener with the heater leak means there is too much pressure" makes no sense. Any of the above mentioned problem items could cause the error message.