My defrost won't stop blowing hot air ... I have it on cold fan off and it still blows hot. I have searched previous threads and it says I might have a vacuum leak ..checked and no leaks .. what can it be

 

check for a vacuum line that goes from the vacuum football under the battery tray. that line is the vacuum for the HVAC and if anything happens to it...

 

Do u mean that black ball? Cuz if it is..that's the one I checked ..and no leaks ..

 

gotta check the vacuum line also, not just the ball. but yes that is the ball I am talking about. There is a vacuum line that runs from there, usually under the battery tray, to the HVAC controls.

 

Oh yeah I checked both ...is there a way to cover the ducts? From the engine bay?

 

Anyone have other ideas on what else it could be.

 

Bump

 

Bump

 

I took that EGG out years ago and put a small watch battery in the opening of the hose fitting... haha not proud of it, but probably holds the same pressure

 

well the Chevy astro van I drive for the state foresters was spewing hot air constantly from defrost, so I looked up the fuse diagram and checked the AC/ rear defrost fuse. It was blown, a simple 20 A micro fixed it.

 

Moved to OEM tech.

Please avoid "bumping"

 

Oh my bad..

 

No worries, all good!

Have you checked fuses like suggested?