Audi Q7 Owners & Service Manuals

Audi Q7: A/C System, General Information

Audi Q7 (4M) 2016-2025 Workshop Manual / Heating, Ventilation & Air Conditioning / Refrigerant R134a Servicing / A/C System, General Information

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 General Information

Introduction The purpose of this repair manual is to provide service advisors and technicians with the basic knowledge needed to ensure professional and competent procedures.   Note Only the c

 A/C Technology Basic Principles

Physical Principles The four known states of water also apply to air conditioning system refrigerants. 1 - Gaseous (invisible) 2 - Vapor 3 - Liquid 4 - Solid

 Refrigerant R134a

Refrigerant R134a Physical Data Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as ref

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 Incorporating the Heating and A/C System in the Coolant Circuit

Notes for Incorporating the Heating and A/C System in the Coolant Circuit   Note In vehicles with a diesel engine with and without a "parking heater", an Auxiliary Heater Control Module -J604- and an Auxiliary Heater Heating Element -Z35- are installed. Refer to → Chapter "Auxiliar

 Cooling Output Test Notes

  Note A start-stop system is available for certain engines of this vehicle as optional equipment. Depending on the setting on the Front A/C Display Control Head -E87- (and if present at the Rear A/C Display Control Head -E265-) it can prevent the stop function. If, for example, the "def

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