I do not have any heat in my Ford Taurus. It seems like it is stuck in the a/c mode. I have replaced the thermostat, but that did not work. I do not have any noise in the switching of air to heat when i turn the knob.

I'm thinking that it may be the heater knob that shows red to blue- A/C to heater.

Answer:It sounds like you may have a bad blend door motor. This blend door motor is a electric motor located behind the radio, in the dash, that controls the temperature of the hot and cold air flow. They are known to go bad and get stuck in one position or the other- so no sound when switching. The part is about $90 and is not very hard to replace on your own. If you have no heat, open the hood and check both heater hoses going into the fire wall to the heater core are HOT.

If they are then you know hot water is getting to the heater core and you should be able to get heat out the vents. The only thing in your way is the blend door motor, or the door itself is stuck. If it is a broken door, this is a much bigger job- as the heater case will need to be removed.

Ford Taurus Not Blowing Out Front Vents

2001 Ford Taurus
Question: my ac is working, my fan is working but will not blow out the front vents.

Answer:There is most likely a problem with the mode actuator or mode door inside the heater case under the dash. This controls the direction of flow for the air to which ever position you choose, either the floor, vent, or defrost position. When the air will not come out a selected mode, something is stopping the mode door from moving. This would either be the actuator itself, which controls the door, or the door itself which may be broken.

There could also be something wrong with the control head, or if the system is vacuum controlled, there can be a vacuum source issue. Definitely lots to check, good luck!