2nd Row A/C not blowing hard

[wardo]

The A/C is working normally in the front seats. The air blows cold and hard. 2nd row is blowing cold air for the driver side but not the passenger side. I briefly stuck my hand up in the headliner and could not tell if something was obstructing the air. The insulation (fiber looking material was very lose) some air is coming out, but it’s not blowing hard enough.

My mechanic is on vacation. Any ideas?

Thank you

 

[wardo]

I pulled the door trim and particularly pulled some plastic panels to try and see if something might be blocking the air.
Didn't find anything as expected. I made sure air was blowing on all levels, it was both front and back.

 

[wardo]

So my mechanic dug into the issue today.
All of the mechanics of the a/c are working great. problem seems is the headliner and fiberglass liner have separated. Causing the air pressure to drop in the rear seats.
Is this fiberglass type liner between the roof and headliner suppose to be glued together?

If that's the case I think am upholstery shop needs to fix it?

Could the sunroof drain tube being plugged caused enough water damage to deteriorate the glue bond?