Tools You'll Likely Need:
* Socket set (metric)
* Screwdrivers (Phillips and flathead)
* Pliers
* Possibly a ratchet and extensions
* Trim panel removal tools (to avoid scratching plastic)
* A shop vacuum (to clean out debris)
* New heater blower motor (ensure you get the correct one for your model)
Steps:
1. Disconnect the Battery: This is crucial for safety to prevent accidental shorts. Disconnect the negative (-) terminal first.
2. Access the Blower Motor: This is the most variable step depending on your specific Buick Century. You'll likely need to:
* Remove the passenger side dash panel: This usually involves removing screws and possibly some plastic clips holding the panel in place. Be careful not to break any clips. Work slowly and use trim panel removal tools to help pry things loose.
* Remove the glove box (if necessary): This might provide better access to the blower motor housing.
* Locate the blower motor housing: This is typically behind the glove box or under the dash, and will require removing screws and possibly other components to gain access. Your repair manual will show the exact location and how to remove it.
3. Disconnect Electrical Connections: There will be at least one electrical connector to the blower motor. Carefully unplug it. You might want to take a picture to remember how it connects.
4. Remove the Blower Motor: The blower motor is usually held in place by screws or retaining clips. Remove these fasteners. The motor might be difficult to reach, requiring some maneuvering.
5. Clean the Housing: While you have access, thoroughly clean the blower motor housing. Dust, leaves, and other debris accumulate and can hinder airflow. Use a shop vacuum to remove as much debris as possible.
6. Install the New Blower Motor: Carefully install the new blower motor, ensuring it's seated correctly. Replace any fasteners you removed.
7. Reconnect Electrical Connections: Reattach the electrical connector to the new blower motor, making sure it's securely plugged in.
8. Reassemble Everything: Carefully put everything back together in reverse order of disassembly. Ensure all screws and clips are properly secured.
9. Reconnect the Battery: Reconnect the battery's negative (-) terminal.
10. Test the Blower Motor: Turn on your ignition and test the blower motor on all speeds. If it doesn't work, double-check all your connections and ensure the motor is correctly installed.
Important Considerations:
* Repair Manual: A service manual specific to your 1989 Buick Century Custom is invaluable. It will provide detailed diagrams and instructions specific to your car.
* Safety First: Disconnect the battery before working on any electrical components.
* Patience: This is a time-consuming job. Take your time and be methodical.
* Professional Help: If you're uncomfortable with any part of this process, consider taking your car to a qualified mechanic.
This is a general guide. Without a repair manual, you may run into unforeseen challenges. Always prioritize safety and consult the appropriate resources before starting this repair.
