Replacement of the HVAC blower motor control module (power module/resistor) on a 2024 Tesla Model X. The module is accessed from under the passenger-side dashboard and controls blower fan speed via PWM signal from the HVAC system.

Warnings

Tools required

Parts

• HVAC Blower Motor Control Module (Power Module) — Model X 2024 specific × 1 — Manufacturer-specified blower control module for 2024 Model X HVAC assembly

Preparation

1. TESLA SAFETY PREAMBLE: Park on level ground, place in P, engage parking brake.
2. Exit ALL doors with the key fob taken at least several meters away from the vehicle. Wait a minimum of 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Open the frunk and disconnect the 12V low-voltage battery negative terminal (frunk-mounted on Model X, similar location to Model S). Isolate and insulate the terminal so it cannot make contact.
4. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
5. If at any point you encounter an orange cable, an HV component, or are unsure if a system is de-energized: STOP and consult a Tesla-certified technician.
6. Confirm falcon doors are fully closed and will remain closed (key fob removed from proximity).
7. Move the front passenger seat fully rearward and recline the seatback for working room.
8. Remove floor mat from the passenger footwell and place a clean towel down to protect trim and to set fasteners on.
9. Verify the replacement blower control module matches the OEM unit (connector pinout, mounting tabs, and form factor).

Procedure

1. 1

   Access the passenger footwell
   Kneel or lie at the passenger footwell with a headlamp. Locate the HVAC blower housing on the passenger side, behind/above the footwell carpet area. The blower control module is typically mounted in the side of the blower housing where airflow can cool it.
2. 2

   Remove lower trim panel as needed
   Using a plastic trim tool, gently release the lower passenger-side dash trim / kick panel to gain visual and hand access to the blower housing. Disengage clips by pulling straight outward — do not twist. Set the panel aside on a soft surface.
   ⚠Trim clips on Model X are brittle in cold conditions; warm the cabin briefly before disassembly if working in a cold shop.
3. 3

   Locate the blower control module
   Identify the blower motor control module mounted to the side of the HVAC blower housing. It will have a multi-pin electrical connector and be secured with small fasteners (typically two screws) into the housing. Confirm the connector and mounting before proceeding.
4. 4

   Disconnect the electrical connector
   Depress the connector locking tab and pull the harness connector straight off the module. Do not pull on the wires. Inspect the connector pins for corrosion, melting, or discoloration — heat damage at this connector is a known failure mode and may indicate the harness side also needs attention.
   ⚠If the connector or pins are melted or heat-discolored, the harness pigtail may also need repair/replacement; installing a new module into a damaged connector will cause repeat failure.
5. 5

   Remove the module retaining fasteners
   Remove the screws/bolts retaining the blower control module to the blower housing. Keep the fasteners — they are reused. Note the orientation of the module.
6. 6

   Withdraw the failed module
   Carefully pull the module straight out of the housing. The heatsink fins (if present) sit inside the airflow path of the blower — withdraw squarely so as not to bend or break fins inside the duct. Inspect the duct interior for any debris or broken fin material and remove it.
   ⚠Any plastic or metal debris left inside the HVAC duct can be drawn into the blower wheel and cause noise or a follow-up failure.
7. 7

   Compare old and new modules
   Place the failed and replacement modules side-by-side. Verify identical connector keying, heatsink shape, mounting hole pattern, and overall dimensions before installation.
8. 8

   Install the new blower control module
   Insert the new module squarely into the housing opening, ensuring the heatsink/fins seat in the airflow path and the housing seal (if present) is properly seated to prevent air bypass.
9. 9

   Secure the module
   Install the retaining fasteners and tighten evenly. Do not overtighten — the module body and housing are plastic.
   Torque spec

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

    Reconnect the harness
    Align the harness connector to the module and push straight in until the locking tab clicks home. Give a light tug to confirm the connector is fully latched.

Reassembly

1. Reinstall the lower passenger-side dash / kick trim, ensuring all clips fully seat. Listen for each clip to click.
2. Replace the floor mat and any items removed from the footwell.
3. Return the passenger seat to its prior position.
4. At the frunk, reconnect the 12V battery negative terminal and torque per spec — see torqueRefs.
5. Close the frunk.

Verification

• With the key fob present, wake the vehicle and turn on the HVAC system from the touchscreen.
• Cycle the fan through ALL speed settings (lowest to highest). Speed should change smoothly and proportionally at each step — no skipped speeds, no fan running at one fixed speed regardless of setting.
• Listen for unusual noise from the blower (rubbing, ticking) which would indicate debris in the duct or an unseated module.
• Verify auto climate control modulates fan speed appropriately when commanded.
• Check the touchscreen Service / Alerts page for any HVAC or blower-related fault codes; clear them if appropriate and confirm none return after a drive cycle.
• After ~10 minutes of operation on high, confirm there is no burning smell from the passenger vents — this would indicate connector heat damage that was not addressed.
• While servicing the HVAC area, note that Tesla recommends cabin air filter replacement every 2 years (3 years on HEPA-equipped Model X). Log the date if filters were inspected or replaced during this job.

More procedures for this vehicle