Originally Posted by 88racing
For the rear heat.....
First of all, you need to verify the hoses to the rear heater core are getting hot. If so, then the heater core should also be hot. Typically, the rear blend door actuator fails and the flap that controls the airflow through the heater core is not able to move to the full heat position.
The interior trim panels must be removed for access. The actuator should be tested to see if it responds when the temperature is changed on the controls. You will probably hear it trying to work, but the plastic gears inside the actuator fail and the actuator can't position the flaps inside the plenum that control temperature and airflow.
Okay, I will check this weekend. I already know where the blend door, heater core & actuator are located for the front, but where do I find the rear heater core & blend door? Are both front/rear being controlled by the ones at the front under the dashboard? Or each has it's own separate heating/cooling system and located in 2 different areas?