Air blowing with vehicle not running

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

InspectahDEck

Member
Joined
Oct 15, 2013
Posts
43
Reaction score
22
On my way home the air kicked on full blast on its own. Seems to be blowing out of front windshield defroster. Turning the air off did nothing, just kept on blowing. When I got home and turned off the vehicle it continued to keep running, so I disconnected the battery.

05 yukon, 210k miles

I recorded a quick video


Looking for ideas where to start troubleshooting, I appreciate any help, thanks
 

Fless

Staff member
Super Moderator
Joined
Apr 2, 2017
Posts
10,435
Reaction score
20,721
Location
Elev 5,280
So this is the HVAC blower? If so, pull the blower fuse in the underhood fusebox. You may have to pull the HVAC control fuse, too.

Capture.JPG

Then I would suggest inspecting the blower motor resistor (passenger side underdash area); it's a common failure item on these. The wires get hot and melt together, or the resistor fails internally. Be careful when buying a new resistor and make sure you get the same part. Most come with a new pigtail and you'll probably need that.
 
Top