electrical

Blower Motor Control Module

for 2024 Tesla Model Y Long Range Dual Motor AWD · AWD

Difficulty

Easy

Time

1.0 h

Tools

Steps

Replace the HVAC blower motor control module (blower speed resistor/regulator) on a 2024 Model Y. The module is accessible from the front passenger footwell and controls blower fan speed via PWM signal from the climate system.

Warnings

⚠️Do not touch, cut, or pierce any orange cabling. Although this job is in the cabin HVAC area, the Model Y has HV runs nearby — orange = lethal voltage.

⚠The blower control module contains ESD-sensitive electronics. Handle by the housing only and avoid touching connector pins.

⚠The plastic HVAC housing and footwell trim panels on the Model Y are brittle and use fragile clip retainers. Use plastic trim tools — do not pry with metal screwdrivers.

ℹ️If the blower itself runs only at one speed or not at all after replacement, the fault may be in the blower motor or climate ECU, not the control module.

Tools required

Trim removal tool set (plastic)Essential

T20 Torx driverEssential

T25 Torx driver

1/4" drive ratchet with short extensionEssential

10mm socket (for 12V battery terminal)Essential

Small inch-pound torque wrench (1–10 Nm range)Essential

Flashlight or headlampEssential

ESD-safe wrist strap

Parts

HVAC Blower Motor Control Module (PWM regulator) × 1 — Manufacturer-specified blower control module for 2024 Model Y — verify by part number on existing unit before ordering

Preparation

Park on level ground, place in P, engage parking brake.
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.
Disconnect the 12V low-voltage battery. On the 2024 Model Y the 12V (Li-ion) battery is located under the rear of the front trunk / under a service panel — refer to the Tesla Service Manual for exact access on your build. Loosen the negative terminal first.
DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
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.
Slide the front passenger seat fully rearward and recline the seatback to maximize footwell working room.
Place a clean towel or fender cover over the door sill to protect the trim.
Confirm the climate system is OFF in the touchscreen before disconnecting 12V (prevents fault codes on reconnection).

Procedure

1
Access the passenger footwell
Working from the front passenger side, look up under the dashboard at the underside of the HVAC housing. The blower motor housing is the large round/cylindrical plastic assembly on the passenger side; the blower control module is mounted to the side of this housing and is identified by a multi-pin electrical connector and 2–3 small fasteners. Remove any lower trim panel or kick panel as needed using a plastic trim tool — release clips gently.
⚠Do not pull on wiring harnesses to gain visibility — they are routed tightly behind the dash.
2
Locate the blower control module
Identify the control module: it is a small finned (heat-sinked) electronic module mounted directly to the blower housing, with a single electrical connector. Visually trace the wiring from the blower motor area to confirm before removing fasteners.
3
Disconnect the electrical connector
Press the connector's locking tab and gently pull the harness connector straight off the module. Inspect connector pins for corrosion, melting, or push-back; any heat damage indicates a wiring issue that must be addressed before installing a new module.
⚠Melted or discolored pins indicate the new module will fail again unless the harness side is repaired.
4
Remove the module mounting fasteners
Remove the small screws securing the control module to the blower housing (typically Torx). Support the module with one hand as the last screw comes out so it does not drop into the footwell. Note fastener length/location for reinstallation.
5
Remove the old module
Withdraw the module straight out of the blower housing. The module's heat sink/control element protrudes into the air stream — do not bend or scrape it on the housing. Inspect the seal/gasket area on the housing for debris or damage.
6
Compare old and new modules
Place old and new modules side by side. Confirm identical connector keying, mounting pattern, and heat sink shape. A mismatched module will fit but produce incorrect blower behavior or fault codes.
7
Install the new control module
Carefully insert the new module's element into the blower housing, ensuring the gasket (if present) seats flat. Align the mounting holes and start all screws by hand before tightening any. Tighten the connector screws/fasteners evenly to the manufacturer-specified torque.
⚠Do not over-torque — the housing is plastic and threads will strip.
Torque spec
Connector Screws4 Nm (3 lb-ft)
8
Reconnect the harness
Plug the harness connector firmly into the new module until the locking tab clicks. Lightly tug to confirm engagement.

Reassembly

Reinstall any kick panel or lower trim removed during access — ensure all clips are fully seated (no rattles).
Return the passenger seat to its prior position.
Reconnect the 12V battery negative terminal and torque to the Battery Terminal Bolts spec (6.0 Nm / 4.0 lb-ft) — do not overtighten.
Close the front trunk / battery service panel.
Wake the vehicle by opening a door; allow the touchscreen to fully boot (this can take up to 60 seconds after 12V reconnection).

Verification

Start the climate system from the touchscreen. Cycle the fan from speed 1 through speed 10 (or auto low to high) and confirm smooth, proportional speed change at each setting — not just on/off.
Listen for unusual buzzing, ticking, or PWM whine from the passenger footwell area; the new module should be silent.
Switch between Auto, Defrost, and manual modes; verify blower responds correctly in each.
Check the touchscreen Service menu for any active HVAC fault alerts. If a fault persists after a full drive cycle, a Tesla Service Center scan tool may be required to clear stored climate DTCs.
After the drive, verify cabin temperature reaches set point in a reasonable time — abnormally weak airflow at high settings may indicate a cabin air filter due for replacement (Tesla recommends every 2 years).
Note: while the dash is open is a convenient time to inspect/replace the cabin air filter if it is near its 2-year interval.