why does my Toyota Highlander XU70 (2020-Present) air conditioning smell bad

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on level ground and the engine is off.
• Disconnect the negative battery terminal for safety.

2. Replace Cabin Air Filter

• Remove the glove compartment by opening it and pressing the sides to unhook it.
• Locate the cabin air filter housing, typically behind the glove compartment.
• Remove the old cabin air filter and clean any debris from the housing.
• Install a new cabin air filter, ensuring the airflow direction matches the markings.
• Reattach the glove compartment.

3. Clean AC Evaporator

• Access the AC evaporator by removing the dashboard panels if necessary.
• Use a specialized AC cleaner spray (follow manufacturer instructions) to treat the evaporator.
• Allow the cleaner to sit for the recommended time to kill mold and bacteria.
• Wipe excess cleaner with a clean rag and allow the evaporator to dry.

4. Clear Drain Tube

• Locate the AC drain tube, usually found under the vehicle near the firewall.
• Inspect for blockages (dirt, debris, or kinks).
• Use compressed air to blow through the tube or a flexible wire to clear any obstruction.
• Ensure that the drain is flowing properly after clearing.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and turn on the air conditioning system to the highest setting.
• Monitor for any persistent odors and ensure the system is operating correctly.