2006 GMC Yukon Slt front air vents not blowing on any setting. Please Help

[Josh Howard]

Hello everyone. I have a problem with my front air vents not blowing air on any setting.
It has a auto control module.
I replaced the resistor and the blower motor still no air blowing when turned on. I checked to see if I had power to the resistor and I did, I also have power going to the blower motor but the blower still doesn’t want to work.
The fuses are good. The rear air/heat works fine. I’m really stuck and don’t know where to go from here. It’s cold and I need to fix this ASAP. Please if you know anything or have any ideas send me a message.
Thank you.

 

[Doubeleive]

blend door or blend door actuator or both, some can be really hard to get to depending on which is the case it may require removing the dash or cutting inside the dash. hopefully yours is the easy one.

 

[drowssap]

I think he is saying that the blower motor does not even blow air. If that is the case the blend door has nothing to do with the problem! BUT....if I read that correctly then yes....you gave hime the correct answer!

 

[Josh Howard]

Yes the blower motor does not blow any air at all but is getting power sent to it.

 

[RET423]

Is the motor making any noise like it's spinning or is there no sound when you turn the fan on?

 

[Doubeleive]

you should be able to hear if the fan is kicking on or not when you turn the control knob speed, turn it all the way on high and listen by glove box area, if it's not coming on for sure then you could have a bad resistor kit or the fan is shot or the control unit is bad. I think the front would still blow air up/down or forward even if the blend door was stuck.

 

[Doubeleive]

I think he is saying that the blower motor does not even blow air. If that is the case the blend door has nothing to do with the problem! BUT....if I read that correctly then yes....you gave hime the correct answer!

your right I misread that, but if the fan is kicking on then it would be a blend door closed one way or the other I think it would still blow up or down or forward regardless

 

[Josh Howard]

Yes the blower motor does not blow any air at all but is getting power sent to it.

Is the motor making any noise like it's spinning or is there no sound when you turn the fan on?

No sound at all. Tested the blower motor with a battery and it worked. Testesd the connector at the blower motor and have power.

 

[Doubeleive]

ok well that leaves 2 possibilities then either the resistor kit is no good or the control unit is bad, unless your incredibly unlucky and there is a wiring short somewhere in between.

 

[Josh Howard]

ok well that leaves 2 possibilities then either the resistor kit is no good or the control unit is bad, unless your incredibly unlucky and there is a wiring short somewhere in between.[/QUOTE
Yeah that’s what I’m thinking after everything ive done so far. Tomorrow I’ll try again and see what I get. Thanks your for input!

 

[Josh Howard]

ok well that leaves 2 possibilities then either the resistor kit is no good or the control unit is bad, unless your incredibly unlucky and there is a wiring short somewhere in between.

That’s what I was thinking too. Tomorrow I’m going to swap out the resistor with another one to see if that works. If not I’m going to have to find a new module so I can test that as well. Thanks for all your input!

 

[Rocket Man]

Nobody mentioned the other half of any 12v system. Could be the motor lost it's ground wherever that may be. You could try a jumper to the negative wire of the motor. We always check for power but not ground.

 

[Josh Howard]

I was able to figure it out! It was the resistor. The new one I installed was defective so I swapped it out for a different one and it worked immediately. So glad to have air/heat again thanks everyone for your responses!

 

[Doubeleive]

closed

 

[Rocket Man]

Awesome, glad to hear you have heat again. Must have been an aftermarket resistor?