This procedure guides you through removing and replacing the blower motor control module in a 2025 Rivian EDV 500 commercial delivery van, which regulates HVAC fan speed and operation.

Warnings

Tools required

Parts

• Blower motor control module × 1 — Use OEM specification
• Trim panel clips × 5 — Replacement for any damaged clips
• Dielectric grease × 1 — For electrical connections

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn off all vehicle systems using the center display
3. Allow vehicle to enter deep sleep mode (wait 5 minutes after powering off)
4. Open hood and disconnect 12V battery negative terminal
5. Wait 10 minutes for capacitors to discharge
6. Ensure you have the vehicle security code for system reactivation
7. Place protective covering over driver seat and floor area

Procedure

1. 1

   Access lower dash area
   Remove the lower dash trim panel on the driver side. Use trim removal tools to carefully release the clips starting from the bottom edge and working upward. There are approximately 8 clips securing this panel. Set panel aside in a safe location.
2. 2

   Remove knee bolster panel
   Locate and remove the knee bolster panel below the steering column. Remove three T20 Torx screws securing the panel, then gently pull the panel toward you to release the remaining clips. Disconnect any electrical connectors for courtesy lighting if present.
3. 3

   Locate blower motor control module
   The blower motor control module is mounted on the passenger side of the HVAC unit housing, behind the lower dash area. It is a rectangular module approximately 4x3 inches with a multi-pin connector and cooling fins. Identify the module location and note the connector orientation.
4. 4

   Disconnect blower motor control module connector
   Locate the main electrical connector on the blower motor control module. Press the release tab on the connector and carefully pull straight out to disconnect. Do not twist or bend the connector. If there is a secondary ground wire, disconnect it as well.
   ⚠The connector pins are delicate. Ensure the release tab is fully depressed before pulling to avoid pin damage.
5. 5

   Remove mounting fasteners
   Remove the two 10mm bolts securing the blower motor control module to the HVAC housing bracket. Support the module with one hand while removing the final fastener to prevent it from falling.
6. 6

   Remove old control module
   Carefully withdraw the blower motor control module from its mounting location. Note the orientation of the cooling fins and any rubber isolation mounts. Inspect the mounting area for any debris or moisture that could indicate additional HVAC issues.
7. 7

   Inspect electrical connector and wiring
   Examine the electrical connector on the vehicle harness side for signs of corrosion, melting, or damage. Check all pins for proper seating and condition. Clean connector contacts with electrical contact cleaner if necessary. Inspect wiring for chafing or damage.
8. 8

   Prepare new control module
   Remove the new blower motor control module from packaging. Verify part number matches the original. Transfer any rubber isolation mounts from the old module to the new one if they are not pre-installed. Apply a small amount of dielectric grease to the connector pins on the new module.
9. 9

   Install new control module
   Position the new blower motor control module into the mounting bracket, ensuring proper orientation with cooling fins facing the correct direction for airflow. Align mounting holes with the bracket. Hand-thread the two 10mm mounting bolts, then tighten securely. Ensure module is firmly seated against the HVAC housing.
10. 10

    Reconnect electrical connector
    Align the main electrical connector and press firmly until you hear and feel a positive click indicating full engagement. Verify the connector locking tab is fully engaged. If applicable, reconnect the ground wire and tighten securely.
11. 11

    Reinstall dash panels
    Reinstall the knee bolster panel, reconnecting any courtesy light connectors. Install and tighten the three T20 Torx screws. Reinstall the lower dash trim panel by aligning clips and pressing firmly until all clips engage. Verify all panels are secure and properly seated.
12. 12

    Reconnect 12V battery
    Return to the front of the vehicle and reconnect the 12V battery negative terminal. Tighten the terminal clamp securely. Close the hood.
13. 13

    Initialize and calibrate system
    Enter the vehicle and power on the system using the center display. The vehicle may require security code entry. Once powered, navigate to the service menu using the Rivian diagnostic tool or center display. Perform blower motor control module initialization and calibration procedure as specified in Rivian service documentation. This allows the vehicle to recognize the new module.

Reassembly

1. Ensure all trim panels are fully seated with no gaps or misalignment
2. Verify all electrical connections are secure and properly locked
3. Check that no tools or parts were left in the dash cavity
4. Confirm all mounting fasteners are properly tightened

Verification

• Turn on the HVAC system and test all blower speed settings from lowest to highest
• Verify smooth operation with no unusual noises, vibrations, or hesitation
• Check that AUTO mode functions correctly and adjusts fan speed appropriately
• Confirm no warning lights or HVAC-related fault codes appear on the instrument cluster
• Use diagnostic tool to verify no DTCs are present related to the blower motor control module
• Test both heating and cooling modes to ensure proper airflow control
• Verify defrost mode operates correctly with appropriate fan speed
• Allow vehicle to run through a complete HVAC cycle to confirm long-term stable operation

More procedures for this vehicle