First, you don't have a heater control valve. In the vehicle is a blend door that determines if you get heat or AC. It is located near the heater core under the dash.
However, I need you to check something. With the engine running, hot, and the heater on high, feel both heater core hoses. Both should be hot.
Let me know what you find.
Thursday, December 10th, 2009 AT 8:17 AM