1. Preparation and Safety:
* Disconnect the battery: This is crucial to prevent accidental shorts and damage to your electrical system.
* Gather tools: You'll likely need a small flathead screwdriver, possibly a Phillips head screwdriver, possibly a trim removal tool (plastic pry tools are best to avoid scratching), and possibly needle-nose pliers.
* Consult a repair manual: A Chilton's or Haynes repair manual specific to your year and model Stratus will be invaluable. It will show you exactly how the dash components are assembled and how to access the heater control mechanism. Online repair manuals are also available, but quality varies.
* Take pictures: Before disassembling anything, take pictures of each step. This will be a lifesaver when putting things back together.
2. Accessing the Heater Control:
* Remove the radio: This is usually the first step. Consult your repair manual for specific instructions on removing your radio. The process usually involves removing the trim bezel around the radio and then disconnecting the wiring harness.
* Remove the trim around the heater controls: Gently pry off the trim surrounding the heater control panel. Use trim removal tools to avoid damaging the plastic. Be careful; these clips can be fragile.
* Remove the heater control assembly: Once the trim is removed, you'll likely have access to screws or clips holding the heater control unit in place. Remove these carefully. Again, refer to your repair manual for the correct procedure.
3. Repairing the Linkage:
Once you've removed the heater control unit, you'll see the linkage mechanism. The problem is likely one of these:
* Broken shaft: The plastic shaft connecting the knob to the control mechanism may have broken. If this is the case, you'll likely need to replace the entire heater control unit. These can be found online or at auto parts stores.
* Loose connection: The knob may have simply come loose from its shaft. If this is the case, you might be able to re-attach it, but it might require some careful manipulation and possibly a small amount of adhesive (like super glue or epoxy – use sparingly).
* Broken linkage: The linkage connecting the knob to the heater control actuators might be broken or disconnected. This might require replacing the linkage or possibly repairing it with small zip ties or carefully applying glue, if feasible.
4. Reassembly:
* Reattach the linkage: If you were able to repair the linkage, make sure it's properly connected to both the knob and the control mechanism.
* Reinstall the heater control unit: Carefully reinstall the heater control unit, ensuring all screws and clips are securely fastened.
* Reinstall the trim: Replace the trim around the heater control panel.
* Reinstall the radio: Reinstall the radio and its trim.
* Reconnect the battery: Reconnect the battery.
* Test the heater controls: Turn on the ignition and test the heater controls to ensure they're working correctly.
Important Considerations:
* Complexity: This is not a simple job and requires patience and attention to detail.
* Replacement: If the damage is significant, replacing the entire heater control unit might be easier and less frustrating than attempting a repair.
* Professional help: If you're uncomfortable working on your car's interior, it's best to take it to a qualified mechanic.
This process is a general guideline. Always consult your repair manual for your specific vehicle year and model for the most accurate and safe repair instructions. Improper disassembly can damage other components, so proceed with caution.
