2003 Ford Mustang GT: Air only coming out of the vents when turned to high

[AirFuelsFire]

So, I decided to throw the A/C yesterday for just a little bit to cool down. Turn the knob to A/C and left the fan speed at slowest one and didnt feel anything. Turned it to the next speed, nothing and the third the same. It isnt until I turn it to full blast that I feel anything out of the vents. Does the same with Max A/C as well.

Does the same thing for heat too?.

When on full blast the air is ice cold. The vents worked fine over the winter for the heat. Anyone know what causes this? Blend door actuator?

Thanks
--John

[GT800]

either the switch is bad or the transistor for the blower motor

[02Sally]

The same thing happened to my car it's an easy fix. I'll have to ask Shawn which part he had to change but it didn't take him long at all



Edit


It was the transistor. Thanks dan for the reminder lol

[AirFuelsFire]

Awesome! Anyone have a DIY walkthrough?

Or is it called a Blower Motor Resistor?

http://www.partsgeek.com/catalog/200..._resistor.html

[Zer0 T]

Originally Posted by AirFuelsFire

Or is it called a Blower Motor Resistor?

Yep, resistor. Had to replace it on my '99 F150 last year. Really easy to do!

It will be right behind the glove box mounted in the blower housing. Just a couple screws hold it in.

[GT800]

yup sorry resistor they are cheap and very easy to change but thats probably it

[AirFuelsFire]

Originally Posted by Zer0 T

Yep, resistor. Had to replace it on my '99 F150 last year. Really easy to do!

It will be right behind the glove box mounted in the blower housing. Just a couple screws hold it in.

Cool, thank you. I did some research on-line and it looks pretty simple. I think I might even be able to handle it.

Originally Posted by gt/cs07

yup sorry resistor they are cheap and very easy to change but thats probably it

Gracias

[dvs_03gt]

what if ure problems kind of the oppopiste. max ac really blows barely than ac works like max ac should and setting 1 and 2 are just normal an seem fine?

would it be the same thing as AirFuelsFire is looking for?

[Hotshot]

it could be like mine got messed up a while back. the knob itself may be a little messed up and not aligned properly. your knobs pull off if i'm not mistaken right? pull it off and turn the internal part and inspect it. I had to yank on a plastic part to align it properly and now it works fine