A/C Cooling Output, Testing Requirements

• The ambient temperature is greater than 15 °C.
• Radiator and condenser are clean (if necessary, clean).
• If a vehicle has electric radiator shutters, their function is OK.
• The A/C compressor ribbed belt is OK and tensioned correctly. The belt pulley is actually driving the A/C compressor (vehicles without a high-voltage system). Refer to OVERVIEW - BELT PULLEY .
• All air ducts, covers and seals are OK and properly installed.
• Airflow through the dust and pollen filter is not obstructed by debris. Refer to DUST AND POLLEN FILTER, REMOVING AND INSTALLING .
• The air intake (in fresh air and recirculating air mode) is not impaired by debris or retrofitted components.
• The air duct for glove compartment cooling is installed in the glove compartment as specified. Refer to AIR DUCT FOR GLOVE COMPARTMENT COOLING, REMOVING AND INSTALLING .
• The vehicle is not exposed to sunlight.
• The engine is warm (the coolant temperature is higher than 80 °C).
• The DTC memory of the Front A/C Display Control Head -E87- and the Rear A/C Display Control Head -E265- or the Vehicle Electrical System Control Module -J519- are called up and the malfunctions present are fixed. Use the Vehicle Diagnostic Tester.
• The following is set in the MMI (Multi Media Interface) via the "A/C" function in the "Car" / "Vehicle" menu for the regulation of the A/C system: automatic recirculation "off" and "medium" footwell temperature (arrow pointing upward).
• All instrument panel vents and the vents in the rear center console and in the B-pillar are open.
• The vent for glove compartment cooling (in the glove compartment) is closed.
• Make sure that the air vent from the rear footwell vents (under the front seat) is not blocked by the floor mats or other objects.
• The hood is closed.
• The engine is running.

Also on vehicles with a high-voltage system (Audi Q7 e-tron)

• No errors are stored in the Thermal Management Control Module -J1024- and the function of the components controlled by the Thermal Management Control Module -J1024- is OK. Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function.

All

For the front section of the vehicle interior and also the rear (if equipped), the following settings should be set on the controls:

• "Auto" mode (indicator lamp in the AUTO  button lights up).
• Select "cold" temperature preset for all zones ("LOW" display).
• A/C compressor is switched on and maximum cooling output is selected (the indicator lamp in the A/C MAX  button lights up).
• Fresh air blower preset (the Fresh Air Blower -V2- and the Rear Fresh Air Blower -V80-) "maximum speed".

TIP

• For the different settings. Refer to the A/C system information in the Owner's Manual.
• The indicator lamp in the AUTO  button turns off when performing manual changes for the airflow direction and/or the fresh air blower speed.
• The maximum possible fresh air blower speed depends on various ambient influences (coolant temperature, electrical system voltage, etc.)

Functions with Engine Running:

-- The radiator fan(s) (Radiator Fan -V7- and Radiator Fan 2 -V177-) run (activation and speed depend on refrigerant circuit pressure and engine temperature).