99 express van heater control

[bfreeman]

the heater or air will not move from floor to defrost or dash. How do you find the vacum system and where do you start.

[MT-2500]

Originally Posted by bfreeman

the heater or air will not move from floor to defrost or dash. How do you find the vacum system and where do you start.

What size van and engine?
Auto or manual heater controls?
Always start with checking for good engine vacuum from engine to heater control.
Got good vacuum there?