sounds like the blend doors arent working in the heat/ac plenum. take a look at all your door motors and see if they are connected and working properly
There are 2 filters you access in the glove box. If they are dirty you get almost no air. Clean or replace them and be amazed at the difference
most likely it's a bad thermostat, or your vents not working properly.
yes
Jammed blend door or blockage in the ducts if you mean to say air isn't blowing through at all.
i had the same problem .. i got frion and put it in and it worked fine
I have the same problem, and looking for answers. Please help!
it happened to me it was a dead bird or a mouse i cant rember wich but it was inside of it.
If the fan is working but not blowing air out of top vents, It is a vacuum hose. You need to take engine cover off to get to hose.
Blower motor working? Could be bad vacuum motor or connection could be plugged evaporator
this one is easy your switch the controls the vents is not working there is a flap the closes the defrost vents so that it goes through the other vents or there is a vacumn line that is controlled by the switch, and its leaking. The vacumn line is usually on the engine side of the firewall. It is a very small plastic tube comming out of the middle of the firewall at the top and it connects to a junction with other vacumn lines. See if any of them are disconnected.
Your AC might be blowing out of dash vents on the windscreen as you might have turned the knob to that particular mode. It is also possible that the vent mechanism might be out of order or broken.
I'm not sure what vents you are talking about, but usually air vents are known to be working if there is air flowing through them.