So I have a 2008 lt2 half panel and the ac/heat is blowing air at the off position when I switch to any speed it doesn’t blow. I replaced the resistor this morning and still not working properly. Has anyone else had this problem? Any guidance will be appreciated. Thank you for your time to read this.

 

Any work done just before this started?
The only way that can happen naturally is a bad switch or, somebody altered the wiring.

 

Check the back of the HVAC panel in the waterfall , remove it and look for melted connections. See post #8 in here

https://www.chevyhhr.net/forums/prob...control-63603/