Windstar 2001 heater is not working cold air only no heat

SOURCE: Ford windstar 2001

Replace the heater actuator switch it is not allowing the door to open, Ours did the same thing so I relaced it . it cost 90.00 from ford

SOURCE: heater

Likely it has more to do with the door that controlls the airflow. Which should be operated by vacum might check and make sure all thevacum lines are plugged in.

Does the gauge in the car show it warms up?

SOURCE: Heater making noise and not blowing hot air.

You need to replace the temp actuator.

SOURCE: Why doesn't the heater blow hot air?

If your "Check Engine" or "Service Engine Soon" light is on, you need to have that checked out first.
If not, the next thing you should check is your engine coolant level. (Antifreeze) If the coolant level is low, the engine coolant does not circulate through the heater core and the the heater doesn't work. The coolant level could be low for a number of reasons including a leaky hose, water pump, or head gasket. In any case, if it is found to be low, you need to find out why.
If the coolant level is OK then the thermostat function needs to be checked to make sure that the engine is reaching operating temperature.
If all of the above checks out OK, then the heater control valve and/or the blend air door in the HVAC housing needs to be checked for proper operation. (NOTE: some cars are not equipped with a heater control valve)

SOURCE: NO heat in front of 2001 windstar van. Thumping

where is the flaaper down located at in a windstar