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Need help: AC Issues in 08 Silverado

ajsmms25

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ajsmms25 New Member

ajsmms25

Posted
Posted

Hi all,

 

I have a 2008 Silverado with dual climate control. I already know my blend door actuator is going bad as my driver side will sometimes blow hot air and the passenger side cold air when they are both set at the same temperature. I have gotten around this by setting my driver side at 2 degrees less than the passenger side.

My problem:
All the vents blow air EXCEPT the driver side dash vent. The one that blows on your hand/steering wheel. The vent just above it blows great, so yes, since I'm in Georgia I ride with my left hand on that vent. It gets hot here!

Would this be the mode door actuator or is there something else I need to check? Any and all help greatly appreciated.

00Silverado4x4 Senior Enthusiast

00Silverado4x4

Posted
Posted

If all the other dash vents are blowing air as advertised except one I'd say you need to get into the dash and see what's going on with THAT vent. It may have disconnected from the ducting or something has migrating into the system and blocked it off. Also just as a jee whiz, does that vent have an ON/OFF control that may have gotten turned OFF or is broken in the OFF position?

muddkatt Senior Enthusiast

muddkatt

Posted
Posted

I know the 2001 models have the on/off control, don't know about he 2005's. If you don't have good airflow, check the cabin air filter. Just found out my 01 had one after 307,000 miles. Lets not discuss what one looks like after that long. I will say that the vents do blow a "little" more air....... :eek:

ajsmms25 New Member

ajsmms25

Posted
  • Author
Posted

It's a 2008 so there is not a cabinet air filter. It does have an on/off knob, which I have flipped back and forth. The knob feels solid, so I do not think it has broken.

 

I've cycled the different flow patterns (i.e. feet only, face only, both, etc.) but to no avail.

 

Isn't there a piece called a "Mode Door Actuator" that controls the flow patterns? I'm not positive, but I assume it controls the driver side (which one of the vents is working next to the radio). I was wondering if that could be the culprit. All the other vents are blowing fine. I bumped it all the way up to full blast and they move a ton of air, yet NO air comes out of that one vent.

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