That little motor overhead,

[Mr45]

right over the driver's seat, I guess it's for the A/C Temp sensor, is getting louder and louder, especially when it's colder.

How hard is it to replace that thing, and where can I get one?
Do I have to drop the entire headliner to get to it?

 

[yukondoit]

I have no idea on how to replace it, but mine was making the same noise a couple months ago. I didn't do anything to it, it just stopped making noise. Not sure if it burned out or fixed it self. haha..
Oh... btw, I never used that feature on my heater/ac controls... So I'm fine with out it.

 

[ThierryC78]

I have the same problem, that little thing is making a lot of noise. It's a little electric engine ? I wasn't sure. Maybe we can spray some WD40 in there

 

[Mr45]

I have no idea on how to replace it, but mine was making the same noise a couple months ago. I didn't do anything to it, it just stopped making noise. Not sure if it burned out or fixed it self. haha..
Oh... btw, I never used that feature on my heater/ac controls... So I'm fine with out it.

What do you mean, you never used that feature?

 

[ScottL4619]

What do you mean, you never used that feature?

Probably just means that he doesn't use the "auto" at all and just sets the temp and fan manually. I think that little fan only matters when the HVAC is set to "auto".

 

[ezdaar]

OMG! between that noise above my head and the constant knock knock knock of the HVAC door tapping. I go crazy while driving at night with the radio off..

Anyone elses AC speaker above the head get louder as you come to a stop?

 

[Mr45]

OMG! between that noise above my head and the constant knock knock knock of the HVAC door tapping. I go crazy while driving at night with the radio off..

Anyone elses AC speaker above the head get louder as you come to a stop?

AC Speaker....nice way to put it, but you, the pitch changes as I hit the brakes or stop.

Probably just means that he doesn't use the "auto" at all and just sets the temp and fan manually. I think that little fan only matters when the HVAC is set to "auto".

Never thought of that, but I wonder if it stops if I go to manual.

Don't get me wrong, the A/C works great in auto.

 

[ThierryC78]

I pulled the plastic cover to see if anything could be done about that fan. It is index a small plastic fan set in a huge casing. The fan blades were filthy so I cleaned them as good as I could and I sprayed WD40 to try to lube up the engine.
I noticed that the noise comes from the casing vibrating against the liner. The casing is way too big to allow removal without taking off the headliner.
I noticed my fan turns on as soon as the car has power, the speed varies but I couldn't see why.

 

[MASS-HOE'Z71]

So after you cleaned/lubed it, did the noise go lessen any? Mine only seems to be overly obnoxious when its cold in the morning, stays noisey while im backing up outta my driveway and goes away when i shift into drive. Dont kno why, i'd like to say because the little motor warms up enough by then but couldnt really say

 

[03YukonNH]

There's another thread on this topic somewhere on this site but you can remove that hvac fan motor pretty easily. Pop the cover off the fan first. Next, take the trim off from around the sunroof and pull the headliner down a bit. There are some plastic-like velcro strips holding it up so you have to pull a bit hard. Now you can unclip the electrical connector. You can then slide the whole housing out. I then unsnapped the case around the fan and cleaned everything up and put some red grease on the shaft of the fan. Put everything back together and you can't even tell its there.

Edit*

Here is the other thread on this subject http://www.tahoeyukonforum.com/forum/showthread.php?t=15695&highlight=little+speaker

 

[Mr45]

Key word being "Sunroof" there....

 

[03YukonNH]

Key word being "Sunroof" there....

I knew someone was gonna point that out after I wrote it. I believe you can also access the motor if you take off the trim around the door frame and pull the headliner down after that.

 

[TnTahoe]

i usually just bump on mine when it makes the noise and it will stop, ive also heard that blowing compressed air in there would help-something about the dust building up

 

[blueflamed03]

I heard high, compressed air cleans it, helps lower the buzzing sound...<shrugs shoulders>

 

[polobuds]

^+1

heard that too. worth a try before going through all the work to remove the liner and all...

 

[ezdaar]

AAHH! so thats what why she makes so mutch noise, the shaft is dry and needs lube!

Going to get into this project ASAP!

 

[Tahoewhat]

LOL... i never even knew what that was above my head. Figured it was for onstar or something.. Never heard mine do anything.

 

[slocaddy]

hey edzarr, are you sure the tapping you hear is the flapper door? that's what it sounded like to me also, but it actually was the spring for the glove box latch. it doesn't come apart so what i did was stuff some.... geez i dont even remember now but a piece of a napkin or paper or something ,you get the idea. My sanity has improved greatly since figuring this out.

 

[VT19]

not to jack this thread but i have a vibrating noise when im running my a/c but it only starts up when i have the yukon stopped with my foot on the brake. while i have my foot on the brake i can turn the a/c off and it goes away and when i turn it on it comes back. for the life of me i cant figure out whats causing it but if any of you guys know could you please feel me in. im confused.

 

[ScottyBoy]

That little fan is called the "Climate Control Aspirator" and its very easy to replace.
It takes all of about 10 minutes to replace it.

The part costs about $45. The part number is 25903301.

Here is a link to a very detailed write up complete with pictures.


http://www.truckmodcentral.com/forums/showthread.php?t=1468