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When replacing the Audi S4 AC Condenser, use only the OEM Audi Aluminum Style Condensers for optimum efficiency.
Before ordering a new Audi AC Evaporator, make sure you have correctly diagnosed the Audi S4 evaporator as the culprit.
The Audi S4 ac receiver drier is used to take all of the water out of the ac system, and to take out any contaminants that may plug the ac system. The Audi S4 ac receiver drier should be changed every time you remove any ac component that exposes the sealed ac system to the atmosphere. We carry the Audi S4 genuine ac receiver drier, so you can maintain the highest quality parts for your .
Replace the Audi S4 Cabin Filter with a Carbon or a Pollen Filter by Bosch. Audi reccomends changing the ACC Cabin Filter every year on your S4.
On a Audi S4 there will be a heater blower motor or an AC blower motor inside the heater box to force air across either an evaporator or heater core. Often there will be a blower motor resistor used to regulate the motors speed. Eventually your Audi S4 heater blower motor may wear out, especially if you have not been changing your Audi S4 Cabin Filter. When you are not getting any air despite what position you have the blower switch set at you may need a new Audi S4 heater blower motor or possibly a new blower motor resistor.
If your Audi S4 Heater core is leaking, make sure to replace the heater hoses and valve. DriveWire sells the genuine and OE Audi S4 Heater cores at discount prices with free shipping.