1980 300cd
The AC system is switched on, and seems to be working properly, for the compressor is running, system is fully charged, and pipes get cold to the touch.
When the fan/blower is activated (turned on), only hot/warm air is being blown into the interior of the car.
The vacuum pump and system is working and is operating some controllers on the air distribution box, but maybe not all.

Question? Is there a way to manually over ride the vacuum system operation regarding this distribution system to allow the AC cooled air to function properly, until I can troubleshoot and repair properly.
I am traveling and it is in the upper 90's now.
Thanks for the help.
Regards, John