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).