Heater control valve
I have a 95 Ford Ranger and I have to replace the heater control valve about every 6 months because the seal around the valve control arm leaks coolant out. I am talking about the valve that controls the flow of coolant to the heater core not the air flap door. Speaking of which, why do you need both air control and hot water control? If the air can't get to the heater core why stop the flow to it? This has been a major pain in the butt. If I can remove the valve that would be good if it would not cause the heat to be on all the time. These valves are about $25 each and I probably spend at least that much in a year trying to keep it full of coolant. The factory valve is probably $400 which is about that the truck is worth.