Vehicle recently moved FROM Arizona TO Tennessee. Obviously in Arizona, I did not require the heater function so I never suspected there might be a problem. Here in Tennessee, it is starting to get cold so I discovered the problem.
Air Conditioning works great. Control panel test does not show any stored faults and the actuator check procedure appears to perform properly. Vents open/close properly, fan speeds operate etc. When set to heat, the center vent closes and I feel air at the foot well and side vents though it is cold air. Additionally, when I set system to defrost, the fan speed does indeed go to high speed but the output air remains cold.
Coolant level is proper and the vehicle does not over heat. After vehicle is up to normal temps, I feel the radiator hoses and both upper and lower hoses are hot. I have NOT attempted to clean the cabin air sensor on the panel beneath the steering wheel. I will probably try to clean that this week end.
How should I test the electrical heater control water valve? Also, if I recall, the vehicle uses an auxiliary coolant pump to pump heated coolant into the heater coil. I have UNsuccessfully attempted to trace the hose from the heater control valve to the pump. Where is that auxiliary pump located and how should I test it for proper operation?
Thanks in advance for any information you might be able to share with me to resolve this problem.
Sunday, November 6th, 2011 AT 12:05 AM