On our MH I had to leave the hotwater bypass open for a while in order to get the antifreeze to flow through the incomming water line to the washer. There should be a small instection panel below the washer that you can take off to see if the water lines to the washer turn red. And there are both cold and hot water lines to the washer.
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.