This procedure covers the removal and replacement of the blower motor control module, which regulates HVAC blower motor speed in the 2021-2024 Ford F-150 with 3.5L EcoBoost engine.

Warnings

Tools required

Parts

• Blower motor control module × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition to OFF position and remove key
3. Disconnect negative battery terminal to prevent electrical short circuits
4. Open passenger door and adjust seat fully rearward for access
5. Allow HVAC system to cool if recently operated

Procedure

1. 1

   Disconnect battery
   Disconnect the negative battery terminal using a 10mm socket. Move the cable away from the terminal and secure it to prevent accidental contact during the repair.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
2. 2

   Remove lower dash panel
   Locate the lower dash panel below the glove box on the passenger side. Remove the trim panel by carefully releasing the retaining clips using trim removal tools. Start from the bottom edge and work upward to avoid breaking clips. Set panel aside in a safe location.
3. 3

   Empty and remove glove box
   Open the glove box and remove all contents. Squeeze the sides of the glove box inward to release the stop tabs from the dashboard. Lower the glove box completely and disconnect the damper arm on the right side. Remove the glove box assembly to gain access to the blower motor area.
   ℹ️Some models may have screws securing the glove box. Check for fasteners before forcing removal.
4. 4

   Locate blower motor control module
   Using a work light, locate the blower motor control module mounted on or near the blower motor housing on the passenger side of the HVAC plenum. The module is typically a rectangular electronic component with a wiring harness connector and cooling fins.
   ℹ️On 2021-2024 F-150 models, the module is positioned above the blower motor, near the firewall.
5. 5

   Disconnect module electrical connector
   Press the locking tab on the electrical connector and carefully pull the connector straight off the blower motor control module. Do not pull on the wires themselves. Inspect the connector pins for corrosion or damage.
6. 6

   Remove module mounting fasteners
   Remove the module mounting screws or bolts securing the blower motor control module to the HVAC housing using a 7mm socket or appropriate tool. There are typically 2-3 fasteners. Keep fasteners organized for reinstallation.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
7. 7

   Remove failed module
   Carefully pull the blower motor control module away from the HVAC housing. The module may have a thermal pad or grease interface with the housing for heat dissipation. Note the orientation and positioning for proper installation of the new module.
8. 8

   Prepare new module
   Inspect the mounting surface on the HVAC housing and clean any old thermal compound or debris. If the new module includes a thermal pad, ensure it is properly positioned on the module. If using thermal compound, apply a thin even layer to the contact surface of the new module.
   ℹ️Proper thermal contact is critical for module longevity and performance.
9. 9

   Install new module
   Position the new blower motor control module in the same orientation as the original. Align the mounting holes and ensure the thermal interface makes full contact with the housing. Install and hand-tighten the mounting fasteners before final torquing.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
10. 10

    Reconnect electrical connector
    Apply a small amount of dielectric grease to the connector terminals if desired for corrosion protection. Align the electrical connector with the module and push firmly until the locking tab clicks into place. Verify the connection is secure by gently tugging on the connector body.
11. 11

    Reinstall glove box
    Reconnect the glove box damper arm to the right side of the glove box. Lift the glove box into position and squeeze the sides inward to allow the stop tabs to enter the dashboard slots. Release and verify the glove box operates smoothly.
12. 12

    Reinstall lower dash panel
    Position the lower dash trim panel and align all retaining clips with their receptacles. Press firmly around the perimeter until all clips are fully seated and the panel is flush with the surrounding trim.
13. 13

    Reconnect battery
    Reconnect the negative battery terminal and tighten to specification using a torque wrench. Do not overtighten as this can damage the terminal or post.
    ⚠Battery terminal bolts require only 6.0 Nm (4.0 lb-ft). Overtightening can strip threads or crack the terminal.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Verify all trim panels are properly seated and secure
2. Ensure no tools or parts were left in the HVAC plenum area
3. Reset clock and radio presets as needed after battery reconnection

Verification

• Turn ignition to ON position without starting the engine
• Turn on the HVAC system and test all blower motor speed settings (low, medium, high)
• Verify smooth operation at all speed settings without unusual noise or hesitation
• Check for proper airflow from all vents
• Start the engine and verify blower motor continues to operate normally under all conditions
• Monitor for any HVAC-related warning lights or messages on the instrument cluster
• Test automatic climate control functions if equipped to ensure proper module communication

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