Possible heater control unit failure as this system has a hot/cold blend door actuator and a separate defrost floor blend door actuator so default setting is defrost for that actuator but not hot setting so controller fault is most likely
SOURCE: climate control
try putting the selector in a desired position with the key on then turn off the key and disconnect the battery for 10min.
SOURCE: 2006 Ford Crown Victoria HVAC only blows thru windshield defrost
You have a vacuum leak. Defrost is the default postion(no Vacuum). Start by finding the small black vacuum line near the heater hoses at the fire wall under the hood.Trace it back, it should go to a square black reservoir . Not totally sure exactly where it is located on this model,shop manual doesn't show a very good pic, but it states to remove wiper arm and pivot shaft to remove it. You will see a second line going from here to intake manifold vacuum port. Make sure you don't have a leak there somewhere.
SOURCE: climate control system only blow air out defrost vent
there is a good chance that you blend air door is stuck closed over your heater core and therefore not allowing the heat to flow, also your door that opens and close your direction of flow from the floor ,das,vent and defrost.your going to have to remove the lower cowling of the dash on the passenger side analso some of the center dash to actually check to see if the cable,servo motors. are acuating the doors.the issue could be just a stuck door or a misaligned cable or that it came off. that falls under the mechanical side of probabilities. electrical would most likely be a faulty selector switch or a servo motor
SOURCE: climate control is on defrost only the auto
Check your vacuum pump located on the right side fenderwell. see if its running. Check the vacuum hose at the hubs for leaks or damage. repair if damaged. check for other vacuum leaks such as the grey hose going to the heater control valve.
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When I move the control to the vents it still stays on defrost. And even if I turn the climate control all the way to the blue the air is still hot. But I'm able to still control the blower speed just fine? Its really confusing cause i dont hear any clicking noises like if i had a bad blend door actuator. So do you think just my climate control knob is bad or is it my controller that has my a.c. defrost vent knob?
The problem is with controller the speed switch may be replaceable on it's own but the hot/cold actuator and vent/defrost actuator control is part of the main unit that you can not replace each unit but must as a whole
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