audi ac recharge

Audi A/C Air Conditioner Recharge Procedure

Is your Audi A/C blowing hot air even when the temperature setting is cold? Learn how to fix it by recharging the Air Conditioner on your Audi.

The procedure below can help you restore the A/C on your Audi. This procedure only works if there is a minor refrigerant leak. Large refrigerant leaks should be repaired before refilling the a/c system.

What you will need

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  • A/C Recharge Kit
  • Work Gloves
  • Glasses


  1. Park your Audi in a safe area. Turn off the engine.
  2. Pull the hood release located under the dashboard on the driver’s side. Open hood.
  3. Locate the low-pressure port. This picture shows the A/C charging port on an Audi A4. audi location of ac charging port Note that there also is a high-pressure line. Don’t use that line. The A/C charging kit connector will not fit on the port for the high-pressure line. The A/C kit only fits on the low-pressure port.location of ac low pressure port on Audi A S Q TT models 3rd
  4. Remove the cap from the low-pressure port of your Audi. diy ac recharge mamo allyr
  5. Connect your A/C hose to the charging port. Get ready to add freon to your Audi A/C system. Audi A S Q TT models ac recharge diy video allmo allyr
  6. Start the engine and let it idle. how to charge the ac on Audi A S Q TT models
  7. Turn A/C on. Before you can start adding refrigerant, you need to turn A/C on and set it to the max cold setting. Once you start the engine, you are ready to add refrigerant to your Audi air conditioner system.
  8. Follow the instructions as directed on your particular A/C recharge kit. As you charge the system, stop pressing the trigger every few minutes to obtain a pressure reading. Continue adding refrigerant until your gauge reaches the charged range. Do not allow the system to overcharge.

These instructions on recharging the Audi A/C system work on :

  • A1
  • A3
  • A4
  • A5
  • A6
  • A7
  • Q3
  • Q5
  • Q7
  • TT

We hope you find this “Audi A/C Air Conditioner Recharge Procedure” guide helpful for your Audi vehicle. Check these troubleshooting and repair guides for more help on your vehicle.


  • Rushit Hila • ASE Certified

    Rushit Hila, an ASE-certified engineer (G1 Automotive Maintenance and Repair), brings over two decades of hands-on experience in the automotive world to his writing. With a strong educational background, including a Master of Science in Engineering and a Bachelor of Science in Engineering, he has honed his skills and expertise through years of practical work. As a respected authority in the field, Mr. Hila is dedicated to offering insightful and valuable content that resonates with both vehicle owners and mechanics.

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  1. Anonymous says:

    I cannot locate the charge port on my 2017 Q7 Prestige. Can someone point me in the right direction please.

  2. Anonymous says:

    This is a well explained article. I’ll add how if the A/C starts to blow out hot air, it can be a cause of concern and in some cases very dangerous. In some cases it can be a broke condenser, circuit faults or just a leak.

    If not fixed, these problems can cause big trouble. I’d suggest if you experience this even when you do not need an A/C get this fixed asap.

    To be more precise on what the issue is, you can use a scanner.