Replacement of the HVAC blower motor control module (power module/resistor) on a 2024 Model X Plaid. The module typically lives at the blower housing under the passenger-side dash and regulates fan speed via PWM signals from the climate ECU.

Warnings

Tools required

Parts

• Blower Motor Control Module (HVAC fan power module) × 1 — OEM Tesla Model X (2021+ refresh) HVAC blower control module — confirm part with VIN at parts counter
• Cabin air filter set (recommended replacement while dash trim is open) × 1 — OEM Tesla Model X refresh cabin filter set (HEPA if equipped)

Preparation

1. Park on level ground, place in P, engage the parking brake.
2. Exit ALL doors with the key fob away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Disconnect the 12V low-voltage battery in the frunk (lift frunk liner, remove battery cover, loosen negative terminal first). See architecture notes — 12V is in the frunk on Model X.
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. Verify falcon doors are CLOSED and the vehicle is in Service Mode if available (via touchscreen) before disconnecting 12V, to prevent door actuator faults on reconnect.
7. Slide the front passenger seat fully rearward and recline for clearance under the dash.
8. Place a clean shop blanket on the passenger floor mat to protect the carpet and provide a comfortable working surface.
9. Set the climate system OFF before powering down, so the blower is not commanded on at next 12V reconnect.

Procedure

1. 1

   Locate the blower control module
   Lying on your back in the passenger footwell, look up and to the rear of the glovebox area. The HVAC blower housing is the large black plastic box centered behind the glovebox. The blower control module is mounted to the blower housing with a multi-pin connector and a finned heat-sink protruding into the airflow path. Confirm visual access before removing trim.
2. 2

   Remove the passenger lower dash / knee trim
   Using a non-marring trim tool, carefully release the lower dash kick panel and any sound-deadening cover blocking the blower housing. Disconnect any ambient lighting or footwell lamp connectors as the panel comes free. Set hardware aside in a labeled tray — fastener types vary by build date.
   ⚠Pull straight on clip-retained panels — torquing the panel sideways will snap the integrated clips, which are not separately serviceable.
3. 3

   Remove the glovebox (if required for access)
   On Model X refresh, the glovebox is electronically released from the touchscreen (Controls > Glovebox). With the 12V disconnected this is no longer possible, so if you did not pre-open it during preparation, you will need to access via the lower trim only. If the glovebox was pre-opened, remove its retaining fasteners and disconnect the actuator/light harness, then set the glovebox aside.
   ℹ️Best practice: open the glovebox via the touchscreen BEFORE disconnecting the 12V battery. Reconnecting 12V solely to open the glovebox forces a redundant power-down cycle.
4. 4

   Identify and disconnect the module connector
   Locate the wiring harness connector on the blower control module. Depress the locking tab and pull the connector straight off — do not pry on the wires. Inspect the connector for corrosion, melted pins, or heat discoloration; any of these indicates a deeper fault (often a failing blower motor drawing excess current) and the blower motor itself should be evaluated before installing the new module.
   ⚠If pins are heat-discolored, replacing only the module will likely result in a repeat failure. Investigate the blower motor amperage draw before final assembly.
5. 5

   Remove the module from the blower housing
   Remove the small fasteners (typically 2–3 screws) securing the module flange to the blower housing. Withdraw the module straight out — the heat sink fingers protrude into the air path and must clear the housing opening without bending. Inspect the housing seal/gasket; if torn, it must be replaced to prevent unmetered air leaks (which cause climate temperature stratification complaints).
6. 6

   Compare old and new modules
   Place the old and new modules side by side. Verify connector keying, heat-sink geometry, mounting flange pattern, and any QR/part label match expectations for VIN. A mismatched module will fit mechanically but will not respond to PWM commands, leaving the blower stuck at one speed or non-functional.
7. 7

   Install the new module
   With the ESD strap on, install the new module into the blower housing, ensuring the gasket/seal is seated and the heat-sink is fully inside the air stream. Install the retaining screws hand-tight first, then torque evenly. Use the verified Module Mounting Bolt spec.
   Torque spec

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

   Reconnect the harness
   Push the harness connector squarely onto the module until the locking tab clicks fully home. Give the connector a light tug to confirm full lock. Route the harness clear of the heat-sink fins.
   ⚠A partially-latched connector will work intermittently and can throw climate fault codes only after heat-soak — confirm the click.
9. 9

   Replace cabin air filter (recommended)
   While the lower dash is open, replace the cabin air filter(s). Tesla's published recommendation is every 2 years (3 years for HEPA/Bioweapon Defense). Note the airflow arrow direction on the new filter before installation.

Reassembly

1. Reinstall the glovebox (if removed), reconnecting any actuator/lighting harnesses before fastening.
2. Reinstall the lower dash / knee panel, reconnecting any ambient light or footwell lamp connectors. Press each clip home individually rather than slapping the panel.
3. Verify no tools, fasteners, or shop rags remain in the footwell or under the dash.
4. Reconnect the 12V battery in the frunk (positive first if it was removed, then negative). Torque battery terminal hardware per the verified Battery Terminal Bolt spec — do not overtighten.
5. Reinstall the 12V battery cover and frunk liner.
6. Allow the vehicle 60–90 seconds with doors closed to complete its wake-up and module handshake before opening any door.

Verification

• Power on the vehicle. Open the climate menu on the touchscreen and cycle the fan from speed 1 through speed 10. Each step should produce an audible and tactile increase in airflow with no hesitation, ticking, or buzzing from behind the glovebox.
• Set the system to AUTO and a low setpoint (e.g. 65°F) — the blower should ramp smoothly from low to high and back down as cabin temperature stabilizes.
• Check for any climate or HVAC fault messages on the touchscreen alerts page. Specific blower control faults will reappear within 1–2 minutes of operation if the new module is mismatched or the connector is partially seated.
• With the vehicle stationary and doors closed, listen at the passenger footwell for any air leak whistle around the blower housing — indicates a missed gasket on reinstall.
• If the cabin air filter was replaced, log the date/mileage. Next replacement: 2 years (or 3 years if HEPA-equipped).
• Cycle each falcon door open and closed once to confirm the 12V reconnect did not leave a door controller in a faulted state.
• For any torque value not provided in the verified data above, torque to OEM specification — refer to Tesla Service Manual.

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