I am at a loss. There is no air blowing into the passenger cabin in either heating or cooling mode.

The fan is definitely working, you can hear it, but it does not push air into the cabin.

The AC is working - at highway speeds with the AC on you can feel conditioned air coming out (not blown out, just kind of leaking out).

The actuator motors for recirculator is working. The actuator motors for the cooling to heat is working as is the actuator for the blend door(s).

I cannot tell whether the doors are working (inside the air box), but I can manually move the door actuator (with the actuator motor removed) and they all move, but again, I cannot tell if the doors are actually flipping inside.

So - all the electronic components seem to be working and yet the air which is being generated by the fan is not flowing into the cabin.

Any thoughts? Could it be a jammed blend door? Are there other flaps and doors that could prevent the air from being blown out? Other tests that can be done?

Losing hope and looking for any help!!

 

I have seen a mouse get into the hvac housing and build a nest that eventually plugged up the evaperator so no air could get through. Remove the glove box and the blower resistor and look into the hole at the evap and see if it is clear.

 

Thanks Tizzy - I wondered about the same thing and had "cracked" the heat box to check that out but did not see anything. I did not take the box fully apart so could have missed something.

I do not fully understand the total air flow through the cabin air system - anybody have a picture that shows how/where the air flows?

The other thing I was wondering - is there a door or flap that I am not aware of or something that the fan control operates besides the fan itself. eg when the control is at off, does that just shut off the fan or does it operate some other positive closing/blocking mechanism?

Thanks

David