why is my Tesla Model 3 Highland (2024-present) AC not blowing cold air anymore

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle in a well-ventilated area and ensure the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Recharge Refrigerant

• Tools Required: AC refrigerant kit, manifold gauge set.
• Sub-steps:
  1. Attach the low-pressure gauge to the AC service port.
  2. Check the gauge reading against manufacturer specifications to determine if recharging is necessary.
  3. If low, connect the refrigerant canister to the manifold gauge and follow the instructions to add refrigerant slowly, monitoring the gauge.
  4. Disconnect the refrigerant canister once the correct pressure is achieved.

3. Inspect and Replace AC Compressor (if necessary)

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Remove the plastic cover and any components obstructing access to the compressor.
  2. Disconnect electrical connectors and refrigerant lines from the compressor.
  3. Unbolt the compressor from its mounting brackets and carefully remove it.
  4. Install the new compressor by reversing the removal steps and tightening bolts to manufacturer specifications.
  5. Reconnect refrigerant lines and electrical connectors.

4. Replace Cabin Air Filter (if necessary)

• Tools Required: None (may require a flathead screwdriver for cover removal).
• Sub-steps:
  1. Locate the cabin air filter access panel (usually behind the glove box).
  2. Remove the panel and take out the old filter.
  3. Install the new cabin air filter, ensuring correct airflow direction.
  4. Reattach the access panel.

5. Reconnect Battery

• Reconnect the battery terminals and ensure connections are tight.