Question about 2005 Ford Freestar

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I have a 2005 Freestar Ltd van. I was on line about 2 weeks ago and was told my problem was the temperature control module. I replaced the module and checked all the blender motors ( which are working fine ). My problem still exists. At 32 degrees C I get too much heat, but when the thermostat is turned down to 28 degrees C or lower it blows cold air and the Van is still cold inside. What else could it be? Don

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Troubleshooting by Symptom Poor Heater System Performance CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.

  1. Start the engine.
  2. Idle the engine until the thermostat opens (upper radiator hose will be hot) Is the engine at normal operating temperature (approx. 200° F)? If yes, go to the next step. If no, go to step 16.
  3. Set the mode selector to FLOOR mode.
  4. Set the heater control selector to the warmest temperature setting.
  5. Set the blower speed the lowest setting.
  6. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 14. If no, go to the next step.
  7. Set the mode selector to PANEL mode.
  8. Select the maximum blower speed.
  9. Select the warmest temperature setting.
  10. Place a thermometer into the center I/P PANEL air outlet and affix a second thermometer to the heater core outlet heater hose.
  11. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 13.
  12. Inspect and repair the cowl, cowl area, recirculation door, and the HVAC evaporator/heater core case for cold air leaks. Repair any problems found, go to step 17.
  13. Inspect the temperature door operation. Repair any problems found, go to step 17.
  14. Turn OFF the engine. Back-flush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Is the inlet heater hose feel significantly hotter than the outlet heater hose? If yes, go to the next step. If no, go to step 17.
  15. Replace the heater core. When the repair is completed, go to step 17.
  16. Check for low engine temperature problems, Repair or replace as needed, go to step 17.
  17. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.

---
It may also be that the temperature sensor is giving faulty data to the temperature control module.
In-Car Temperature Sensor Removal & Installation To Remove:
  1. Remove the instrument cluster finish panel.
  2. Disconnect the in-vehicle temperature sensor connector.
  3. Disconnect the in-vehicle temperature sensor aspirator tube.
  4. Remove the in-vehicle temperature sensor screws.
  5. Remove the in-vehicle temperature sensor.
To Install:
  1. Install the in-vehicle temperature sensor.
  2. Install the in-vehicle temperature sensor screws.
  3. Connect the in-vehicle temperature sensor aspirator tube.
  4. Connect the in-vehicle temperature sensor connector.
  5. Install the instrument cluster finish panel.
---
Beyond that it's a wiring problem between the sensor and the module that you replaced.

Good luck with the repair of your heating system in your 2005 Ford Freestar.

Posted on Nov 06, 2010

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