With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
November, 23, 2012 AT 8:48 PM
Do the heater hoses get hot? Does the engine reach normal operating temp? Also, temp door under dash may have issues?
November, 23, 2012 AT 8:49 PM
Hey wrench, have a good holiday, I didn't see you.