1995 Monte Carlo No Heat

[pwmin]

I used to have heat, but it won't switch from cold anymore.  Started intermittent, but now it's permanent.  I'm thinking it's the blend door actuator.  Any other things it could be besides a vacuum line?  Is this the correct one and where is it located?  Is it the one to the left of the glove box? I've replaced plenty on GMT800s and 2nd Gen W's.

https://www.rockauto.com/en/moreinfo.php?pk=85484&cc=1056428&pt=10721&jsn=667&_nck=S9TpZc1fXxr7Xa7yUkP8%2BeVHrLluc6vJvrD2O9wgZs5RffpngaQG8wezeYP9fpHdOn5lato7smAZZ6tajgo%2ByAcvGnlbm7gWQ1k3lUBRwWeEUtTccaRuCow%2FiASFJvfjkuykQzPMOtbz3c9d3dg2Jwa2GXon2nPW456wgqIX0aMxZ6Nc%2B76i78Di5iBUsi33RWIvDIg08cGCapSM%2FcfHfndGUOG3yYrbav%2FLKA2juWh%2FAYpE3fgdKRVTmgyRZ5Lr3LTjS8N8aR7BaphHG3pne8D1vTbj5ru9dMoXwBdelgZ7crUL5rYxZZQYphmOI%2BTe&_nck=S9TpZc1fXxr7Xa7yUkP8%2BeVHrLluc6vJvrD2O9wgZs5RffpngaQG8wezeYP9fpHdOn5lato7smAZZ6tajgo%2ByAcvGnlbm7gWQ1k3lUBRwWeEUtTccaRuCow%2FiASFJvfjkuykQzPMOtbz3c9d3dg2Jwa2GXon2nPW456wgqIX0aMxZ6Nc%2B76i78Di5iBUsi33RWIvDIg08cGCapSM%2FcfHfndGUOG3yYrbav%2FLKA2juWh%2FAYpE3fgdKRVTmgyRZ5Lr3LTjS8N8aR7BaphHG3pne8D1vTbj5ru9dMoXwBdelgZ7crUL5rYxZZQYphmOI%2BTe

Edited 7 hours ago by pwmin

[pwmin]

and now it's working again.  I ordered the one I linked to, so I'll probably just replace it anyway.

[pwmin]

Well, now it's only blowing out of the defrost.  Fan is working, but I'm not sure about the heat/cold right at this moment.