I just bought a 98 windstar with a 3.8.i have no heat .i changed the thermostat and the motor on the heater box door.could the door be brokin inside and not opening.i no the motor works.is there a valve or another door.i drained the fluid when i changed the thermostat so it wouldnt be air bound
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Re: 98 windstar no heat
First of all check to make sure you put back the correct amount of fluid and then do this start the car up and put antifreeze in it and let it run till it gets to temp you may have an air bubble in the system then put the cap back on right away check the condition of the drive belt
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Is the problem the thermostat, or is the heater control blend door not diverting the blower air across the heater core....or is the heater core clogged? The thermostat is actually the least likely cause of cool air in the passenger compartment.
Nothing in or around the heater core could make a noise. The core is just a small radiator with coolant circulating through it. And if you feel both heater hoses, and both are hot on a warmed up engine, then coolant is circulating through the core and the heat should be working. There must be a door in the heater case that is not letting heat come out.
The noise may be from the blower motor and its plastic fan assembly. It should be pretty easy to take out the blower motor and check for any obstruction.
the thermostat is in the thermostat housing. that is the end part of the upper radiator hose, where it connects to the engine. assuming the car is otherwise running OK it is not your problem, replacing it is a waste of your time. most likely the heater core is shot, that is where you should be looking. it sits within the heater box which is most likely behind the dash under the glove box, over the passenger footwell.
My 99 windstar did this too. It was the blend door that the actuator motor goes into was broke. When you pull the actuator out look into the hole and see if you see a d shape piece coming out of the box if it is not d shape it is broke check out this site great photos
This noise is the blend door electric stepper motor, this motor controls the door inside the heating ducts that diverts air across the heater core to heat the van, either the bleen door is warped from heat and stuck, or the blend door motor is defective, in order to fix this the dash assembly must be pulled to gain access to the motor and the door.
If you have a knock or clicking noise behind the radio, it is the blend motor. The blend door is spring loaded and the gears in the blend motor are "stripped". The door is spring loaded so that the door is closed to the heater core. About 2 hours to replace and a lot of bending and stretching. You don't have to remove the dash, but all of the trim, radio, and controls will need to come out.