HVAC Mode issue

[Steve L]

When Running my A/C the fan will blow out of the selected vent initially, but at some point it eventually stops blowing out of the selected vent. I checked the mode actuator by the accelerator and it appears to be working properly. When the air stops blowing out of the selected vent it sounds like air is blowing inside the hvac box under the dash. When this happens turning the vent dash selector does not help.

Any suggestions? Does anyone have an exploded view/diagram of the hvac system?

Thanks

 

[1997chevydriver]

Sounds like your a/c core is freezing up and blocking airflow. Do you have the right amount of refrigerant? Does your compressor cycle on/off at all?

 

[Steve L]

Sounds like your a/c core is freezing up and blocking airflow. Do you have the right amount of refrigerant? Does your compressor cycle on/off at all?

I didn't realize that was a possibility. I will check into it.