Defrost not working

2013 CHEVROLET MALIBU
236,000 MILES • 2.5L • 4 CYL • 2WD
Avatar
SHAWN KOLONICH
  • MEMBER
  • 4 POSTS
The short - My defroster is not blowing to the glass. I then observed that I could not force the air away from the dash vents using any of the mode buttons.
I found the actuators under the dash (driver's side) and they appear to be working, at least moving the gears that I could see. II removed the large white gear wheel, and the two levers fell out in pieces. I purchased the levers and attempted to reinstall, but I assume that there is a way to zero or index the gears, and a designated groove for the lever knobs to ride in on the back of the white wheel gear.

There is an inner and an outer groove on the white gear. I am trying very hard to DIY this job but as you know it is a challenge, just in the location of the repair alone. I hope that you can provide guidance on the way this is to be reinstalled and maybe provide insight on a way to do this without laying under the dash, using a small mirror. Or, If I am way off base, a course correction.

Thanks
Nov 16, 2021 at 6:20 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Hi,

If it is the gear you are replacing, you should be able to access it by removing the left side outlet air duct. See pic 1 below.

As far as replacing the gear, pics 2 and 3.

If it is the cam gears that fell out, the only way I know to install them properly requires the HVAC module to be removed. If that is the case, let me know. Also, let me know if this vehicle has automatic or manual climate control. The info below is specific to the manual.

Let me know what I can do to help.

Joe

See pics below.
Nov 16, 2021 at 7:50 PM
Avatar
SHAWN KOLONICH
  • MEMBER
  • 4 POSTS
Thank you Joe! It is the 2 cam gears that were broken and fell out. I have been trying to get them back in with the air duct removed gaining access under the dash but lighting, mirrors, and hands larger than a toddler make this quite an endeavor. I researched a bit on removing the HVAC Module and this looks to be not a DIY job, requiring evac and recovery?

Anything additional that you can provide is greatly appreciated.
Nov 17, 2021 at 1:33 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Hi,

I totally understand. There simply isn't enough room for a person to work on it. As far as the removal of the module, it does require the removal of the following:

Inst panel cluster
inst panel support
door seal trims
brake and accelerator pedals
inst panel tie bar
inst cluster panel
inst cluster support

And the list goes on and on. LOL If you want to try it yourself, I will be happy to get you all the directions.

Let me know.

Joe
Nov 17, 2021 at 5:04 PM
Avatar
SHAWN KOLONICH
  • MEMBER
  • 4 POSTS
Joe,

Unfortunately, I don't think I have time to do all that on this daily driver and still get to work. For me, that sounds like an entire weekend, providing I had no commitments in the following week, for when Murphy arrives.

I really appreciate the input and advice. Thank you.

Shawn
Nov 19, 2021 at 12:33 PM
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Shawn,

You are very welcome, and I totally understand. However, if you change your mind, let me know. I'll try my best to help you from here.

Also, please feel free to come back anytime in the future. You're always welcome here.

Take care,

Joe
Nov 19, 2021 at 9:09 PM