I have a '94 Taurus Wagon doing the same thing and I can't get any heat and I'm wondering if these problems are related. I've been through the flushing and clearing things and still no heat. I'm wondering how much water should come out of the heater hoses when I take one or both of them off. Seems like there is not water in the hoses. Car doesn't overheat and the thermostate seems OK.