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This guide provides instructions on how to charge the A/C system on Audi vehicles. If your A/C is blowing hot air, there is a chance that the system is low on freon, and the system needs to be refilled.

Table of Contents


What you will need


  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. 

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  3. Locate the low-pressure port. This picture shows the A/C charging port on an Audi A4. audi location of ac charging portNote 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 a/c 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.

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  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 recharge the Audi A/C system work on :

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