HVAC Fans Won't Turn Off - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 08-27-2011, 10:26 AM Thread Starter
Newcomer
 
Join Date: Jul 2011
Posts: 16
HVAC Fans Won't Turn Off

My Cobalt just came back from the shop and a few days out of it, any time I fire it up, the interior fans turn on to level 3 although the system is turned off. Could it be a blown fuse? I normally don't have the fans on at all, so it's annoying that I can't turn them off.
616balto is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 08-27-2011, 12:38 PM
Newcomer
 
Join Date: Nov 2010
Posts: 13
Quote:
Originally Posted by 616balto View Post
My Cobalt just came back from the shop and a few days out of it, any time I fire it up, the interior fans turn on to level 3 although the system is turned off. Could it be a blown fuse? I normally don't have the fans on at all, so it's annoying that I can't turn them off.
A blown fuse wouldn't allow the fan to come on. The wiring to the switch or a regulator problem is my educated guess.
curryjl is offline  
post #3 of 10 (permalink) Old 08-27-2011, 04:19 PM Thread Starter
Newcomer
 
Join Date: Jul 2011
Posts: 16
Ironically enough, as quickly as it started, the problem went away on its own. Still a tad confused, but we'll let it slide this time...
616balto is offline  
 
post #4 of 10 (permalink) Old 08-27-2011, 05:26 PM
Forum Regular
 
noblite's Avatar
 
Join Date: Mar 2011
Location: Southern IL
Posts: 177
If I am not mistaken there is a relay for the blower so my guess is it got stuck and got jarred loose on its own.
noblite is offline  
post #5 of 10 (permalink) Old 08-30-2011, 01:32 PM Thread Starter
Newcomer
 
Join Date: Jul 2011
Posts: 16
Quote:
Originally Posted by noblite View Post
If I am not mistaken there is a relay for the blower so my guess is it got stuck and got jarred loose on its own.
My neighbor manages the garage it was repaired at, and he's never heard of this problem. But he did mention it sounded like the relay, so I might have him take a look at it.
616balto is offline  
post #6 of 10 (permalink) Old 09-21-2011, 09:53 PM Thread Starter
Newcomer
 
Join Date: Jul 2011
Posts: 16
Aaaaand the problem is back, but only intermittently. Apparently it's a rare problem that no garage has ever heard of. WTF is going on?! Haha.
616balto is offline  
post #7 of 10 (permalink) Old 09-22-2011, 04:12 AM
Forum Regular
 
soulsurfing's Avatar
 
Join Date: Jun 2011
Location: Southwest Wisconsin
Posts: 131
Garage
Quote:
Originally Posted by 616balto View Post
Aaaaand the problem is back, but only intermittently. Apparently it's a rare problem that no garage has ever heard of. WTF is going on?! Haha.
If it is that rare, and you manage to find a solution for it, make sure to post if here so somebody else who has the same problem may found that your solution could also work for them. Other than that, does the speed of the fan change when you adjust the knob of the HVAC panel?
soulsurfing is offline  
post #8 of 10 (permalink) Old 11-08-2011, 10:58 AM
Newcomer
 
Join Date: Nov 2011
Posts: 1
Angry Fans

I don't know what a HVAC fan is but, I know when I turn my key in my 06 chevy cobalt air blows out of my vents very loudly. They come off in on, more on than off it seems. I have my ac turned off. Now I've noticed that my deforst and floor vents do not work at all. Did you find a resolution? I hate to take it to the shop and it be something simple.
NikiB is offline  
post #9 of 10 (permalink) Old 11-08-2011, 01:52 PM
Chevy Customer Service
YourCobalt.com Premium MemberExpert
 
ChevyCustSvc's Avatar
 
Join Date: Nov 2010
Location: Detroit, Michigan USA
Posts: 794
NikiB (and anybody – open invitation),

If I can be of any assistance as a Customer Service representative, whether it be working with you towards resolving a vehicle concern with a dealership, or looking into warranty/recall information, please don’t hesitate to private message me with more information!

Best,
Sarah
GM Customer Service
ChevyCustSvc is offline  
post #10 of 10 (permalink) Old 11-08-2011, 02:12 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
I think you both have heater assembly resistor network problems. The most common symptom is fan goes to high speed and won't give you any options but off and even that sometimes doesn't work. Depending on where the broken wire resistor falls on which contacts.
Coby7 is offline  
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome