why does my Volkswagen Tiguan First Generation (2007-2018) AC only blow hot air

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to ensure safety during repairs.

2. Check and Recharge Refrigerant

• Tools Required: Refrigerant gauge, refrigerant canister, safety goggles, gloves.
• Locate the low-pressure service port.
• Connect the refrigerant gauge to the low-pressure port.
• If the refrigerant level is low, follow the instructions on the refrigerant canister to recharge the system.
• Monitor pressure on the gauge to avoid overcharging.

3. Inspect and Replace AC Compressor

• Tools Required: Socket set, torque wrench, AC compressor replacement kit.
• Remove the drive belt by loosening the tensioner pulley.
• Disconnect the electrical connector from the AC compressor.
• Remove the refrigerant lines from the compressor (recover refrigerant if necessary).
• Unbolt the compressor from its mounting brackets and replace it with the new unit.
• Reconnect refrigerant lines and electrical connector.
• Reinstall the drive belt and ensure proper tension.

4. Replace Cabin Air Filter

• Tools Required: None required, but a flathead screwdriver may help.
• Locate the cabin air filter housing, usually found behind the glove compartment.
• Remove the glove compartment to access the filter housing.
• Take out the old cabin air filter and install the new one, ensuring it is oriented correctly.
• Reassemble the glove compartment.