Checking heat output: Audi A3

🧭 Before you start

Fits: Audi A3 (8P, 2003–2012)

• Special tools named: VAS 5051

📋 Procedure

1. Close the front lid.
2. Close the doors, windows and sun roof.
3. Start air conditioner guided fault-finding "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
4. Open all dash panel vents.
5. Start the engine and allow it to run for several minutes at maximum cooling output. Air conditioner compressor switched on, lamp in AC button lights and rotary temperature control on "“cold”" stop.

6. Set the air outflow direction to "“dash panel vents”" by way of the rotary air distribution control.
7. Set speed "“4”" at the fresh air blower rotary control.
8. Use a thermometer to measure the temperature of the air emerging from the left and right dash panel vents.
9. Compare your measured values to the measured value displayed (for the evaporator output temperature sender G263). Your measured values must not be lower than and after 5 minutes max. 3 °C higher than the value for the evaporator output temperature sender G263.
10. Set the highest possible temperature (rotary temperature control on "“warm”" stop).
11. Use a thermometer to measure the temperature of the air emerging from the left and right dash panel vents.
12. Set the lowest possible temperature (rotary temperature control on "“cold”" stop).
13. Use a thermometer to measure the temperature of the air emerging from the left and right dash panel vents.
14. Bleeding of coolant circuit Engine, mechanics19
15. Incorporation of heat exchanger for heater in air conditioning unit into coolant circuit Engine, mechanics; Rep. Gr. 19
16. Actuation and operation of temperature flap control motor V68"Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051
17. Foam seal at heat exchanger for heater of air conditioning unit
18. Operation of the temperature flaps in the air distribution housing .
19. Thermostat (engine coolant may not warm up properly if thermostat is defective). Engine, mechanics19

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