This procedure covers removal and replacement of the blower motor control module, which regulates HVAC fan speed in the 2011-2014 Ford F-150 3.5L EcoBoost.

Warnings

Tools required

Parts

• Blower Motor Control Module × 1 — Use OEM specification Motorcraft YH-1933 or equivalent

Preparation

1. Park vehicle on level surface and set parking brake
2. Turn ignition off and remove key
3. Open passenger door for access to work area
4. Allow HVAC system to cool if recently operated

Procedure

1. 1

   Disconnect battery negative terminal
   Disconnect the negative battery terminal using a 10mm socket. Wait at least 2 minutes after disconnection to allow airbag system to fully discharge before proceeding with interior work.
   ⚠Wait minimum 2 minutes after battery disconnect before working near airbag components
   Torque spec

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

   Remove glove box
   Open the glove box fully. Squeeze the sides of the glove box inward to release the stops and allow it to drop down completely. Disconnect the glove box damper arm on the right side if equipped. Remove the screws securing the glove box hinge at the bottom and remove the glove box assembly from the dash.
3. 3

   Locate blower motor control module
   With the glove box removed, look toward the center console area behind where the glove box was mounted. The blower motor control module is a rectangular electronic module mounted to the HVAC housing, typically located to the left of the blower motor assembly. It will have a wire harness connector attached.
4. 4

   Disconnect electrical connector
   Locate the electrical connector on the blower motor control module. Press the locking tab on the connector and pull it straight away from the module to disconnect. Do not pull on the wires themselves. If access is tight, a small flat-blade screwdriver may help release the tab.
5. 5

   Remove control module mounting bolts
   Using a 7mm or 8mm socket with extension (size varies by model year), remove the two or three mounting bolts securing the blower motor control module to the HVAC housing. Support the module with one hand while removing the final bolt to prevent it from falling.
   Torque spec

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

   Remove control module
   Carefully pull the blower motor control module away from the HVAC housing. Note the orientation and positioning of the module for installation of the replacement. Inspect the mounting area for any debris, water intrusion, or corrosion that may have caused module failure.
7. 7

   Install new blower motor control module
   Position the new blower motor control module in the same orientation as the original. Align the mounting holes with the HVAC housing. Start all mounting bolts by hand first to ensure proper thread engagement, then torque to specification using the proper sequence (if multiple bolts, tighten in a cross pattern).
   ⚠Do not overtighten module mounting bolts as the plastic housing can crack
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
8. 8

   Reconnect electrical connector
   Push the electrical connector firmly onto the blower motor control module until you hear or feel a distinct click indicating the locking tab has engaged. Gently tug on the connector to verify it is fully seated and locked.
9. 9

   Reinstall glove box
   Position the glove box assembly back into the dash opening. Install and tighten the hinge screws at the bottom. Reconnect the damper arm if equipped. Test that the glove box opens and closes smoothly and that the stops engage properly when fully opened.
10. 10

    Reconnect battery
    Reconnect the negative battery terminal and torque to specification. Ensure the terminal connection is clean and tight.
    ⚠Do not overtighten battery terminal bolts as this can damage the battery post
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Verify all electrical connections are secure and properly locked
2. Ensure glove box operates smoothly and stops engage correctly
3. Confirm no tools or parts were left in the HVAC plenum area

Verification

• Start the engine and turn on the HVAC system
• Test all blower motor speed settings from low to high to verify smooth operation without noise or hesitation
• Verify airflow changes appropriately with each fan speed setting
• Confirm no unusual noises, burning smells, or electrical issues from the blower motor area
• Test both heat and A/C modes at various fan speeds to ensure complete functionality
• Check for proper operation of automatic climate control if equipped

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