[Tech II]

Does air come out at all?

For example, does it come out of the floor only? Do you have the ability to change speeds?

Does the temp change when you go from extreme hot to extreme cold?

Or is your only problem, the mode? In other words, you have air flow, can change the speed and temp, but you just can't change where you want the air flow to come out of(defrost/vent/heat)?

What you need to find out is, are your actuators controlled by vacuum or by voltage....if vac actuated, then you could have a vacuun leak....