It sounds like you have a blend door actuator that is out which will keep the heater from working. Check for vacuum leaks under the hood which go to a small vacuum line headed to the firewall. This is the line that runs the system.
Here is a guide that can help as well:
Below is the blend door actuator locations on your car.
Please let us know what happens.
Images (Click to enlarge)
Tuesday, October 10th, 2017 AT 12:27 PM