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Why is there no heat in a 98 ford econoline with the top hose hot and the bottom hose cold?
Wiki User
∙ 15y ago
I assume you mean the bottom radiator hose which means the radiator is doing a good job in cooling the water. Most likely the thermostat is stuck open and the block temeperature is not getting up enought to give you "hot" water through the heater core. Now if you are talking about the heater hoses then there may be only a small flow because the heater water control valve is only partially open or clogged, Maybe the hose collasped or the heater core is clogged. Remove the hoses from the engine and check them and the heater core flow with your garden hose water pressure. First check to see if the heater core has been bypassed, usually done when a leaking core is present during the summer time.Then check for flow with water hose, if a coolant system stop leak was ever added to the cooling system the heater core is the first to get clogged ,due to the smaller ports. If all is ok there check to see if the air flow vane is being actuated to change the air flow from cold to hot. The vane is usually either vacuum or mechanically operated. On the vacuum style the hoses crack and sometimes the mechanical cables malfunction, either way the vane doesn't engage when the heat setting is applied to allow the air flow into the heater core housing/box.
Wiki User
∙ 15y ago
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