how to fix my Toyota Highlander Third Generation (2014-2019) air conditioning not working

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety during repairs.
• Allow the engine to cool before beginning work on the A/C system.

2. Recharge the Refrigerant

• Use a refrigerant gauge to check the current level of refrigerant in the system.
• If low, connect the refrigerant canister to the low-pressure service port.
• Open the canister valve and allow refrigerant to flow into the system until the correct pressure is reached.
• Monitor the gauge to avoid overcharging.

3. Replace A/C Compressor (if necessary)

• Remove the drive belt by loosening the tensioner using a socket wrench.
• Disconnect electrical connectors from the A/C compressor.
• Remove the mounting bolts of the compressor using a socket set.
• Carefully remove the A/C compressor from its mounting location.
• Install the new compressor by reversing the removal process, ensuring all bolts are torqued to manufacturer specifications.

4. Replace Cabin Air Filter (if necessary)

• Locate the cabin air filter compartment, usually behind the glove box.
• Remove the glove box to access the filter.
• Take out the old cabin air filter and replace it with a new one, ensuring it is oriented correctly.
• Reassemble the glove box.

5. Test the System

• Reconnect the battery and start the engine.
• Turn on the A/C to the maximum setting and check for cold air.
• Monitor for any unusual noises or odors during operation.