Cadillac Repair: Heater not working, vacuum lines, cadillac sedan deville

Question
I have a 93 Cadillac Sedan DeVille. I just had to have the water pump and serpentine belt replaced. Before this work was done, my heater worked fine. Now I have no heat, the fan is working but it only blows cool air. I have added anti freeze and changed the thermostat. And still, no heat. What else can I do?

Answer
Hi Joe,

Just a couple ideas. Air still in cooling system. Vacuum line knocked off controling hot and cold air door.

The problem with computer controlled cars as it relates to vacuum lines is that if non-computer engine would run rough. Computer cars compensate for these problems.

Good luck!

Rob