why does my Tesla Model 3 Highland (2024-present) air conditioning smell bad

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the vehicle's 12V battery to prevent any electrical shorts.

2. Replace Cabin Air Filter

• Sub-steps:
  1. Locate the cabin air filter access panel (usually found under the dashboard or behind the glove compartment).
  2. Remove the screws or clips securing the access panel using a screwdriver.
  3. Carefully pull out the old cabin air filter and inspect for dirt or mold.
  4. Insert a new cabin air filter (ensure it is the correct part for Model 3 Highland) in the same orientation as the old one.
  5. Reattach the access panel and secure it with screws or clips.

3. Clean the HVAC System

• Sub-steps:
  1. Use an HVAC cleaning spray designed for automotive use.
  2. Spray the cleaner into the air intake vents while the AC is running on high to circulate the cleaner through the system.
  3. Allow the cleaner to sit for the manufacturer-recommended time to eliminate odors and mold.
  4. Turn off the AC and allow the system to dry completely.

4. Clear Drain Tube

• Sub-steps:
  1. Locate the drain tube, usually found under the vehicle near the firewall.
  2. Use a flexible cleaning brush or compressed air to clear any blockages.
  3. Check for signs of moisture leaks and ensure the tube is securely connected.

5. Reconnect Battery and Test

• Sub-steps:
  1. Reconnect the vehicle's 12V battery.
  2. Start the vehicle and turn on the air conditioning system.
  3. Test the AC for any remaining odors and confirm proper cooling operation.

Tools Required:

• Screwdriver set
• HVAC cleaner spray
• Flexible cleaning brush
• Compressed air (optional)

Parts Required:

• Cabin air filter
• HVAC cleaning spray

Estimated Repair Time: 1-2 hours

Safety Warnings:

• Disconnect the battery before working on electrical components.
• Ensure the vehicle is in a well-ventilated area when using cleaning chemicals.