[rfuerst911sc]

How much foam has been coming out of the vents ? If most/all the foam on your blend doors is gone you won't get squat of heat or AC . This is a known problem for 986/996/987/997 .

You can pull the service panel on the firewall . You can then watch/listen for the AC clutch to engage . In the front trunk on the passenger side next to the battery are removable plastic covers . When removed you are now looking at the low and high pressure valves .

If the AC is working at all you will feel a temp difference on the aluminum pipes .